You never know who's watching.
Kansas City Royals left-hander Danny Duffy proved that to be true after the staff ace decided to play a prank on teammate Alcides Escobar in the team's clubhouse.
Hiding above Escobar's locker, he reached down to catch the unexpected shortstop by surprise, scaring the daylights out of him.
No one enjoys being scared that badly, but everyone surely loves being the one behind the prank.