Common sense, as it turns out, really isn’t all that common. Whether it’s an honest mistake or just pure confidence, people do some surprisingly wild things without realizing — or caring — how sideways it could go.
That’s basically the entire foundation of r/OopsThatsDeadly, an online corner dedicated to reckless (or brave?) moments.
You’ll see someone casually bare-handing a deadly creature for a quick photo, or a worker tackling a hundred bats using little more than thin plastic gloves. Every single one of these photos captures someone standing just one awkward slip away from a total catastrophe.
They got lucky and lived to tell the tale, but let this list be your friendly reality check: if something looks sketchy, it almost definitely is.
#1 Those Are Five Steps Or More

© Photo: KichernderFuchs
#2 Found Out Why My Dryer Wasn’t Drying

© Photo: firemoonbaby
#3 Aio For Telling My BF This Is A Fire Hazard

© Photo: Important_Bowl_8332
Everyone knows that accidents happen — they just assume they happen to someone else.
This gap between recognizing risk and feeling vulnerable stems from one of cognitive science’s most extensively studied phenomena: optimism bias.
First identified by psychologist Neil Weinstein in 1980, it describes our deep-seated tendency to believe we are uniquely insulated from bad outcomes compared to the people around us. Decades of global research confirms that this isn’t a personality flaw, stubbornness, or reckless disregard for safety. It’s simply how the human brain is wired.
#4 This Guy On TikTok Using His Thigh As A Surface To Cut Firewood Using A Circular Saw. If Only There Was Some Surface Nearby He Could Use Instead

© Photo: vielljaguovza
#5 Honda Claymore

© Photo: blueinagreenworld
#6 Not Safe At All

© Photo: ThatOldG
Utility workers know high-voltage lines can be fatal. Drivers know crashes are daily occurrences. Healthcare staff understand infection risks. Yet, accidents happen. Research shows that general hazard awareness is rarely the issue. The main culprit is personal calibration.
Our brain has a tendency to separate others and us. While this allows us to acknowledge the statistics, we also assume we will never become one.
#7 Screwing Through The Casing Is Insane

© Photo: dg54828
#8 A Company Doing Fiber Install For Verizon Cut Four Holes The Road, Didn’t Put Anything Out To Mark Them, And Left For The Day

© Photo: ArtisticCandy3859
#9 100s Of Bats Found Under The Roof Of A House. This Is The Protection They Wore For The Removal

© Photo: KillaCheezGettinWarm
We feel safest when we think we’re in control, haven’t been hurt yet, and have done a job a hundred times before.
Every safe attempt builds confidence, but that confidence can easily trick us.
Think of texting while walking down the stairs. You do it every day, so you feel safe doing it. But doing something wrong 99 times without falling doesn’t make the steps any less steep.
#10 Is This Too Hot ?

© Photo: kaya-jamtastic
#11 Officer Is Standing A Little Too Close To A Random Sinkhole That No One Is Quite Sure Of The Cause Yet

© Photo: ProfessionalSeaCacti
#12 No Way This Is Safe, Right?

© Photo: jmflyers
A 2025 study showed how optimism bias causes accidents through a simple sequence.
It creates a false sense of security, which lowers our perception of risk. This in turn leads us to take risks and increases our chances of injury.
You would expect a close call to make people cautious, but research shows it does the opposite. When a dangerous gamble doesn’t end in disaster, we treat the safe outcome as proof of skill rather than luck.
Scientists call this the normalization of deviance. If you take the same risky shortcut often enough without getting hurt, bad habits will suddenly start to feel like safe routines.
#13 That’s A Hai Coral Snake, In The Same Family As Cobras, Extremely Venomous

© Photo: ChemicallyLoved
#14 Man Finds Bat Somewhere And Allows It To Crawl Around On His Bare Hands. Bats Found Indoors Or On The Ground Might Be Sick With Rabies

© Photo: Vectorman1989
#15 Dry Cutting Concrete

© Photo: blankdeluxe
Our built-in survival instincts were designed millions of years ago to spot simple, obvious threats. For example, sharp teeth, loud roars, and massive predators. If something looked big and aggressive, our ancestors felt fear and ran away.
The problem is that modern dangers don’t play by Stone Age rules. High-voltage electricity, invisible toxins, microscopic bacteria, and venomous sea creatures often bypass our mental alarm systems.
Consider the Blue-Ringed Octopus. It carries enough tetrodotoxin to paralyze 26 adult humans in minutes, and its bite is so painless you might not even feel it happen. Yet, to many people, it might not look like a threat. Instead, it might come across as a small, pretty beach toy.
In nature, bright colors often act as a warning system — a process called aposematism. But without proper education, our brains misinterpret that vibrant pattern.
#16 Noticed This While Driving On The Freeway So I Followed It
I called it in and followed the semi until the operator told me someone was in route... just imagine the damage it could do at that speed

© Photo: LandscapePale3524
#17 That Seems Approved For Outdoor Use

© Photo: Jumajuce
#18 Should I Call Someone?

© Photo: iamavendingmachine
Beyond evolutionary quirks, some people take wild risks for a far simpler reason: novelty and the dopamine rush.
When we encounter something genuinely new, our brains actively reward us. And whenever our mind successfully registers a completely original piece of visual information, it triggers a surge of dopamine.
In modern society, this drive makes us hunt for shiny weirdness.
The problem is that our brain doesn’t naturally separate a cool discovery from a dangerous one. When someone stumbles across a strange, beautiful creature or an absurdly risky situation, the immediate impulse is usually curiosity.
The desire to touch it, capture it, or snap a quick photo for social media creates an instant reward loop that drowns out our internal sense of caution.
#19 Not A Great Place To Go Sledding

© Photo: Sohcahtoa82
#20 A Friend Sent Me This From Somewhere I Used To Work. I'm Glad I Got Out Of There.(Not Op)

© Photo: Thick_Suggestion_
Social media takes this whole process and cranks it up to eleven.
When people pose on crumbling cliff edges or pick up strange, venomous sea creatures, they might also be chasing clout. The promise of likes, views, and viral attention acts like a massive turbocharger for that brain reward.
Your mind sees a flood of notifications the exact same way it would see winning a jackpot.
#21 Riding A Motorized Lawn Chair With Rollerskates, Riding Way Too Close To A Truck, In Regular Traffic, In A Fragile "Vehicle" With No Head Protection And No Seatbelt, With AirPods Preventing Him From Hearing His Surroundings. He's One Popped Tire Or Distracted Driver Away From Disaster

© Photo: odatbitch
#22 My Sisters Tires

© Photo: RoboPlunger
This is precisely why online communities like r/OopsThatsDeadly are so valuable.
Instead of glorifying reckless stunts, these subreddits act as a crowd-sourced reality check. They call out hidden hazards and, at the same time, don’t spare the people who do stupid things for no reason.
Let this list be a friendly reminder that no picture, thrill, or split-second of online clout is ever worth your life.
#23 "Can I Ignore My Body Rotting?"
It's their flesh dying (necrosis). And the steps/symptoms before this absolutely would have warranted medical attention.

© Photo: thefanum
#24 Insane Hot Tub Deck

© Photo: Olipermoliper
#25 Op Got Defensive And Deleted Their Account After Being Told What A Bad Idea This Is In The Comments
6 mile biking commute across town with this little one strapped to my back!

© Photo: WorriedImpress7624
#26 Using Pressure Treated Lumber To Cook With

© Photo: throughthequad
#27 This Christian Good Luck Charm Will Make Sure Youll Meet The Lord, Soon!

© Photo: blueinagreenworld
#28 Marbled Cone Snail

© Photo: jackedturtle104
#29 Playing With A Highly Venomous Sea Snake

© Photo: Puppiesarebetter
#30 You Can See The Radiation On The Photos Dude 😭

© Photo: RougeNargacuga
#31 Hate To Break It To You
Found these weird tunnels under Paris

© Photo: iggbyetn
#32 Redditor Unconcerned About This

© Photo: Accomplished-Boot-81
#33 A Couple Enjoys Some Privacy As They Embrace In A Hole In The Sand On A Beach In Santa Monica, California. July 1950

© Photo: Major-BFweener
#34 Main Building Furnace Died

© Photo: [deleted]
#35 Swimming Across A Busy Boat Channel At Dusk

© Photo: forthegreyhounds
#36 A Teddy Bear Covered In Years Of Fireplace Soot

© Photo: LeekPutrid4363
#37 Oh Deer

© Photo: Temnodontosaurus
#38 Finds Eastern Brown Snake, Picks It Up For ID Photo On Reddit

© Photo: CautiousEmergency367
#39 Well I Guess It’s My Turn To Get Scolded

© Photo: LadnaStojna
#40 Orange Glow

© Photo: billybonestorm
#41 Microwave Working But Not Working

© Photo: Ignoramasaurus
#42 The Hotel This Person Is Staying In (Malta) Is Running An Ozone Generator Where People Sleep

© Photo: ydkLars
#43 Found This On A Community Page

© Photo: DifficultAd3885
#44 Someone Should Check In On Miss Lorna Lawrence (Liberty Magazine, Jun 28, 1924)

© Photo: UnCidreAuYerMad
#45 Another Human Mouse Trap
Along a walking trail popular with kids on scooters and moms pushing strollers. That log weighs hundreds of pounds and is precariously balanced.

© Photo: RutCry
#46 Car Parked Next To Me Has A Skull With Horns As A Dashboard Accessory

© Photo: CoolPinkBackpack
#47 Wall In Danger Of Collapse

© Photo: Fancy-Pen-2343
#48 Is This Poisonous Hemlock?

© Photo: sweeetscience
#49 Lava Lamp Recycled Into A Candle

© Photo: FriedBeeClits
#50 College Lab Full Of Unmarked Chemical Containers

© Photo: jackleg_gunscientist
#51 I Accidentally Left A Mirror In My Car And This Is What Happened

© Photo: HannahO__O
#52 This Sinkhole Opened In The Middle Of My Road

© Photo: ParanormalCrow
#53 We Baked The First Pizza In Abandoned Mine

© Photo: sBucks24
#54 Nature Jab Backyard “Mad Scientist” Or Neighborhood’s Worst Chemical Hazard?

© Photo: ReplacementIll5779
#55 Should Be Safe Right?

© Photo: spareribs78