HA! Yesterday's prank worked perfectly.
Background: my boss is a total lunatic (literally), unfit to hold his position. He knows nothing about the law or cases we handle, he does no work personally, he engages employees in conferences many hours long, over and over, he's paranoid, neurotic and a pain in the ass, everyone hates him, he should have been fired long ago, he's forced many colleagues to quit out of desperation, and one of my colleagues in particular, has a deep loathing for him and is constantly badmouthing him every day.
So, yesterday I was forced to go into laoban's office for a 3-way call with him that should have taken 10 minutes but just wouldn't stop. Early on I was pissed off, pacing in the office, cussing the bastard, flipping off the telephone, wishing I could get back to other matters. I saw his business cards on his desk and for some reason, I took one before leaving the office. Finally, after 1 hour and 40 minutes, I couldn't take any more, so I simply walked out of the office, without saying a word, with him still rambling on over the phone.
What to do with card? Hmmmm. Might as well give it to my colleague who is crazy about the boss. He'd already left for the day, so I placed the card right in the middle of his desk.
This morning when I arrived, my colleague was sweating. Did I know how that got there? No. Did I know if laoban had been in the office, or if he wanted to speak with him? No. My colleague told me he got a mysterious phone call last night too, which he didn't answer. He appeared to be petrified. Should he call laoban? Should he speak with laoban's assistant? I let him fret it for two hours, periodically coming to my cubicle to speak with me about it, before I finally told him the truth.
It was great. I nailed him good.