Found posted in a humor newsgroup (rec.humor.funny)
A grizzled old man was eating in a truck stop when three Hell's Angels
bikers walked in. The first walked up to the old man and pushed his
cigarette into the old man's pie, and then took a seat at the counter.
The second walked up to the old man and spit into the old man's milk,
and then he took a seat at the counter. The third walked up to the
old man and turned over the old man's plate, and then he took a seat at
the counter. Without a word of protest, the old man quietly left the
diner. Shortly thereafter, one of the bikers said to the waitress,
"Humph, not much of a man, was he?" The waitress replied, "Not much
of a truck driver either. He just backed his truck over three
motorcycles."