A guy driving a truck in the middle of

nowhere picks up a hitch-hiker.
It gets dark and the hitch-hiker
falls asleep. Suddenly bang, and the
hitch-hiker wakes up,”what the
hell was that?”. The truck driver
replies, “some kinda animal, go
back to sleep.”
Further the same thing again, bang, “What the hell was
that?”,
“some kinda animal again.”
Further into the night, bang,
bang, bang, “What the hell was that?”,
“Some bastard!”. “How
terrible”,says the hitch-hiker, “but there
were
3 bangs”
The truck
driver replies, “Yeah, well I had to go through two fences
to get the
bastard. . .”