Whats the worst thing youve done to a friend who was passed out drunk a a party?

A friend visited me in college, got totally wasted and passed out. We brought him to my dorm room so he could sleep it off, and at the last minute, I decided to put him on my roommate's bed. Turned out to be right move. Came back a few hours later and saw the roommate's bed with a huge pile of puke on it.