I'm always messing with people at work. I bought a huge fake rubber roach and placed it on a shelf, an employee was in that area, reaching down to grab something, felt something touching her head & it was the fake bug....funny shit.
I hid that fake bug so many times my gut hurt from laughing....
We did something similar, but with a genuine dead Palmetto. It died such that it looked like a Praying Mantis, its front legs up as if in attack position. It was a huge one, at least 3 to 4 inches long. It ended up perched on the security chief's phone. Funniest day ever...
the conversation went like this..
Me : "Hey, I wonder if Helen's in yet"
Helen "AHHHHHHHHH!!! WHO PUT THE COCK-A-ROACH ON MY PHONE!!!!"
friend : "Yup. She's here."
followed by much laughter..