Our boss is way past retirement age and still manages to run people ragged here. Personally, I like the guy but other staff are less than pleased to work with him.
We've had a secretary adding Optrex to his coffee, which gave him the galloping whatsits, one guy pee in his coffee and memorably we've had two guys pee on his office chair.
The reasoning behind this was to wait until another boss goes into his office and notice the odd odour and drop a few hints that old boss seems to be losing his marbles...