i just remembered this funny story from work. there's this surgeon that was working with my boss that's kinda a prankster. so one day, they're doing this breast surgery (removing cysts or something) on a woman who had implants. during the surgery, as my boss is doing his thing, the other surgeon starts making a hissing noise, as if air was escaping one of the implants or something. my boss starts freaking out, asking people if they heard that and getting all paranoid, which, if you think about it, implants don't have any air...
anyways, when my boss found out that he was just playing with him, he wasn't too happy, but my co-workers and i had a pretty good laugh over that one. guess you had to be there...