A university student missed an exam because she was taken to hospital after spinning on an office chair while revising.
The motion caused Zonera Williams, 21, to suffer acute vertigo on the morning of her examination in the library at University of Bradford.
It left her feeling "very nauseous" and, after she collapsed on the floor, Zonera was dashed to hospital.
Despite being discharged from hospital on the same day, the clinical sciences student missed her exam.
Speaking today, Zonera said: "Everything was spinning, I couldn't even text anyone. I had to go into survival mode for a bit.
"When I was in the ambulance, they tried to bring me round. I felt a lot safer because I was with someone and after a while started feeling better.
"I had to send the video to my uni. I usually just record myself anyway studying, because it helps me concentrate. I also included a doctor's note."
The third-year student says the spinning motion helps her relax and ease exam nerves, so she rocked in the library chair as she memorised key information on the morning of her test.
But the room felt like it was spinning and Zonera had a pounding headache, before she collapsed to the ground.
The young scientist, from Bradford, continued: "It was all just so sudden. One second, I was studying, and the next second I was just on the floor.
"I was reading the words at the same time as spinning, and I got more and more dizzy as I went along. By the end of it I felt very sick, very nauseous.
"They have security guards on site who came to give me a normal check-up.
"After that, I still wasn't feeling better. I think the vertigo and the stress just compounded together. I had an exam upcoming, and that's just the worst.
"They called an ambulance because I was in a really bad state. I wasn't responding properly, I wasn't in my senses.
"I don't get ill that often, so I just couldn't cope with the physical side. It was this sickening stomach feeling, and my head was just pounding.
"It felt like being on a boat. The room was spinning, and emotionally I was extremely stressed. I just wanted to cry.
"Everything was spinning, I couldn't even text anyone. I had to go into survival mode for a bit."
Acute vertigo can last between seconds and hours. Sufferers feel like everything around them is spinning – enough to affect their balance.
If it happens repeatedly, sufferers should visit their GP or go to hospital, like Zonera did.
"When they confirmed it was acute vertigo, I was like, 'wow, I didn't know I could experience that'," Zonera added.
"I thought it was only something you could get on the seas and on transport - not from the library.
"I felt really hopeless because I've never had that before and I didn't know vertigo could be that bad.
"I literally test every chair that I sit on now. I'm like, 'okay, I'm not spinning'.
"The experience has made me want to stay away from spinning on chairs in general. I felt really bad, and I wouldn't recommend that students spin on chairs."
Zonera will be allowed to take the exam at a future date.
A University of Bradford spokesman said: "While we can't disclose individual student circumstances, student welfare is at the heart of everything we do at the University of Bradford and we strive to assist students in any way that we can."
Zonera shared her story on TikTok earlier this month where it racked up more than 70,000 likes, comments and shares.
Users were quick to crack jokes in the comments - and some viewers had even had similar experiences themselves.
One wrote: "Could you not just spin the other way?"
Another joked: "Thanks for the tutorial girl."
A third commented: "Vertigo is actually horrendous, I don't wish it upon my worst enemy."
