Construction worker on the 5th floor of a building needed
a handsaw. So he spots another worker on the ground floor
and yells down to him, but he can't hear him. So the
worker on the 5th floor tries sign language. He pointed to
his eye meaning "I", pointed to his knee meaning "need",
then moved his hand back and forth in a hand saw motion.

The man on the ground floor nods his head, pulls
down his pants, whips out his chop and starts masturbating.

The worker on 5th floor gets so pissed off he runs down to
the ground floor and says,
"What the fuck is your problem!!! I said I needed a hand saw!".

The other guy says, "I knew that! I was just trying to tell
you - I'm coming!