"Sign Language" joke

hi everyone, got some jokes here for you all....
>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!"