New York city man Dennis C. can call himself a world record holder after he was able to flip his eyelids inside out 30 times in 30 seconds. Nasty!

While we suspect he is the only person to have ever attempted such a feat, anybody is able to challenge his mark as long as they don't touch their eyelid with a finger during the attempt, use forceful blinks to flip the eyelid, use the same eyelid for the duration of the bid, and have absolutely no regard for their long-term eye health. (OK, we added that last stipulation.)