The local bar was so sure that its bartender was the strongest man around
that they offered a standing $1000 bet: The bartender would squeeze a
lemon until all the juice ran into a glass, and hand the lemon to a
patron. Anyone who could squeeze out one more drop of juice would win the
money.
Many people had tried over time (weight lifters, longshoremen, etc.) but
nobody could do it.
One day a scrawny little man came in, wearing thick glasses and a
polyester suit, and said in a tiny, squeaky voice, "I'd like to try the
bet."
After the laughter died down, the bartender said OK, grabbed a lemon, and
squeezed away. Then he handed the wrinkled remains of the rind to the
little man.
But the crowd's laughter turned to total silence as the man clenched his
fist around the lemon and six drops fell into the glass. As the crowd
cheered, the bartender paid the $1000, and asked the little man, "What do
you do for a living? Are you a lumberjack, a weight lifter, or what?"
The man replied, "I work for the Internal Revenue Service."