When I was young, I was told if I crossed my eyes that they'd eventually stick like that and the docs would have to perform surgery on me to free them! Man, gotta say I was duped by this next old wive's tale too
Apparently at RIT there exists a staircase that you can descend to the top of and ascend to the bottom of. Yeah you read that right! In other words you can ascend and descend practically forever, yet go nowhere at the same time.