Chicken Prank

Funny. No harm done. Involves math. Four stars. Eve Fairbanks:

...a prank legendarily pulled at my high school in which students procured well fewer than 20 live chickens, numbered them 1 through 20 with magic markers (leaving some numbers out), set them loose, and then sat back and gleefully watched as hapless school officials ran around the school searching for the remaining missing chickens that had never actually existed.