Cop Joke

Two men are driving through Rockhampton when they get pulled over by the boys in blue. The cop walks up and taps on the window with his nightstick. The driver rolls down the window and WHACK, the cop smacks him in the head with the stick.
"What the hell was that for?" the driver asks.
"You're in Queensland mate" the copper answers. "When we pull you over, you better have your license ready when we get to your car."
"I'm sorry, officer," the driver says, "I'm from Victoria".
The copper runs a check on the guy's license--he's clean-- and gives the guy his license back. The copper then walks around to the passenger side and taps on the window. The passenger rolls down the window and WHACK, the copper smacks him on the head with the nightstick.
"What'd you do that for?" the passenger asks.
"Just making your wish come true," replies the copper.
"Making WHAT wish come true?" the passenger asks.
"Because I know," the copper says," that two miles down the road you're gonna turn to your mate and say, "I wish that a**hole would've tried that s**t with me!"