A 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 one more drop of juice out would win the money. Many
people had tried over time (weightlifters, 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 had 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 weightlifter, or what?"

The man replied, "I work for the IRS."