Realizing your limits.

A juggler, driving to his next performance, is stopped by the police. “What are these matches and lighter fluid doing in your car?” asks the cop.

“I’m a juggler and I juggle flaming torches in my act.”

“Oh yeah?” says the doubtful cop. “Let’s see you do it.”

The juggler gets out and starts juggling the blazing torches masterfully.

A couple driving by slows down to watch. “Wow,” says the driver to his wife. “I’m glad I quit drinking. Look at the test they’re giving now!