"Construction Sign Language" joke
A construction worker on the third floor of a building is in need of a handsaw. He sees another worker on the first floor and yells down to him, but the man indicates that he can't hear him. So, the guy on the third floor attempts to use some signs. He points to his eye, meaning 'I', then to his knee, meaning 'need', then he moves his hand back and forth, meaning 'handsaw'.
Seeing this, the worker on the first floor nods, drops his pants, and starts to masturbate.
The man on the third floor freaks out and runs down to the first floor screaming, "What the hell is wrong with you? Are you stupid or something?!? I was telling you that I need a handsaw?"
The guy on the first floor looks at him and replies, "I knew that. I was just telling you that I was coming!"
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