We called this apple-pie bed "short-sheeting" a bed when I was a camper at Camp Pocohontas.

An aside: Our bunks were three in a row, and two across from each other lengthwise. We were in the habit of swinging into the cabin across the metal ends of the bunks, using the two ends facing each other as balance points. A great prank was to put toothpaste across the metal ends so when a fellow camper came swinging in,--oops! Big slide; kerplunk!

My daughter just told me some college dorm pranks that I will not repeat here--gross!!! Frozen urine? Good grief!