An invisible man is here to see you
Nurse: Doctor, there is an invisible man in your waiting room.

Doctor: Tell him I can't see him now. Next.

A man and his Alligator
A man and his alligator walk into a bar and the man asks, "Does this bar serve lawyers?""Of course we do," replied the bartender."Great," said the man, "I'd like a beer... and give me a lawyer for my gator."