If you think back to 2014, you might remember videos scattered across your social media feeds showing your friends standing out in their yards waiting and smiling nervously for the cold shock that was about to hit them.
After your friend spoke a bit and made a pledge to donate money to the ALS Association, a massive bucket of ice water was poured on their head, drenching them as they tried to shake off the cold. And whether it was before or after, each video included a challenge to another friend to do the same thing.
