An accountant is having a hard time sleeping...
An accountant is having a hard time sleeping and goes to see his doctor."Doctor, I just can't get to sleep at night." "Have you tried counting sheep?""That's the problem - I make a mistake and then spend three hours trying to find it."

747 Full of Lawyers
Q: Hear about the terrorist that hijacked a 747 full of lawyers?

A: He threatened to release one every hour if his demands weren't met.