Chicago

Two men were driving through Chicago when they got pulled over by a Chicago Police Officer. The cop walked up and tapped on the window with his nightstick.

The driver rolled down the window and "WHACK," the cop smacked him in the head with his nightstick.

"What the hell was that for?" the driver asked.

"You're in Chicago, son," the officer answered. "When we pull you over in Chicago, you better have your license ready by the time we get to your car."

"I'm sorry, officer," the driver said, "I'm from Wisconsin and didn't know your laws here."
The officer runs a check on the guy's license--he's clean and gives the guy his license back.

The officer then walks around to the passenger side and
taps on the window.

The passenger rolls down the window and "WHACK," the officer smacks him on the head with the nightstick.

"What'd you do that for?" the passenger demands.

"Just making your wish come true," replied the officer.

"Making WHAT wish come true?" the passenger asked.

"Because I know you Cheesehead types," the officer says, "two miles down the road you're going to turn to your buddy and say, 'I wish that asshole would've tried that shit with me"