Just had a seizure.
I have a rapidly flashing GIF that I use to shit on topics I really hate on certain forums. I've looked at it many times in the past with a few seconds of dizziness but nothing besides that. Thought it was just harmless and annoying till today, when I posted it, looked at it, blacked out, and woke up like half an hour later on the floor in a pool of my own vomit which also drenched my keyboard, and a killer throatache and a non-trivial headache.
Won't be using that picture anymore.