What has four wheels and flies?
A garbage truck.
Which letter is silent in "scent"...
Is it the 'C' or the 'S'?
Billion-dollar idea...
A smoke detector that shuts off when you yell, "I'm just cooking!"
Tip: Save business cards of people you don't like.
If you ever hit a parked car accidentally, just write, "Sorry" on the back and leave it on the windshield.