Your best practical joke?

[NCASAUmp]

Originally Posted by BigUmpJohn

I left my mask on a picnic table bench in between games. I picked it back up and took it to the field. I get through the pre-game and prepare to go look at warm up pitches before the start. I put the mask on and the top of my head above the brim of the hat doesn't feel right. After I look at the pitches I take my mask off to see that someone took the top pad of my mask off. I get all flustered only to look over to my UIC to see him waving the black pad in the air. We delayed the game 5 minutes because those things are tough to put back on.

At first, I was picturing a Police Academy-style prank with shoe polish.