I got in trouble a couple weeks ago...
Two female coworkers always went for a morning and afternoon walk around our warehouse and the ajoining one (It was a mile for two laps they said). I got to wondering if they ever encounted any wild life...
And an idea was born... Next time I was at walmart, I picked up a $1 plastic snake... We had some fishing line at home... I was going to sit inside and pull it under the front door, in front of them as they walked past, but a coworker told me to crouch between two cars and pull it out from the bushes...
The boss came out and was trying to get his camera phone to record it as a movie, a bunch of other coworkers were behind the (tinted front door) watching, trying to get their cameras ready, but the girls showed up too soon.
I timed it perfect, as they we looking at the boss (Thinking he'd stepped outside to get better reception on his phone) They both screamed and jumped, doing funky dances to get away from the beast!

Then it got kicked at me and a bunch of swear words unleashed in my direction. They've vowed revenge, but haven't struck yet. I left it in the hallway, and they both took great pleasure in stomping it everytime they went by. I've got it hanging on the wall in my office as a trophy.