Who ate the cleaner?
Some cannibals get a job in a big corporation on condition that they don't eat any of the staff.
Things go well for a while, and then one day the boss calls them into his office and gives them some bad news: an office cleaner is missing in mysterious circumstances and the cannibals are all under suspicion.
The cannibals call an emergency meeting after work and their leader asks, "OK! Which one of you idiots ate the cleaner?"
One of the cannibals sheepishly raises his hand.
"You idiot!" shouts the leader. "For weeks we've been feasting on directors, team leaders, project managers and human resource staff, and then you go and eat someone they'll actually miss!"