He worked it out with a pencil.
He works it out with a pencil.
A grafight.
They both need a *break* every once in a *while*. edit: this is a three-way pun btw - it works better out loud
The HI-C! (punchline must be said in proper pirate voice) (this is what I do when bored at work not even ashamed)
Farhfrumpoopin'.
A brick-layer.
