"Don't drink the water (There's a dead spider in it)."
had to put up this sign when I found a dead spider floating in the water cooler. The bad part is I noticed it AFTER I had two cups.
My BOSS sent me this in an email.
Sounds like your boss is playing with your head. Lie at your desk with your head down for five days without food or water. Then, when he approaches you (or just happens to wander by), jump up and shout "BOO!" That'll show him.