"Difference" joke

A man was driving down a local street one day and approached a stop sign. He barely slowed down and ran right through the stop sign after glancing for traffic. What the driver didn't know was that a policeman was watching the intersection. The policeman pulled out after him and stopped the car two blocks away.

Policeman: "License, registration and proof of insurance please."

Driver: "Before I give it to you, tell me what the heck you stopped me for, man."

Policeman: "Watch your tone sir; you ran the stop sign back there!!"

Driver: "Man, I slowed down, what the heck is the difference!!!"

The police officer pulled the man out of his car, pulled out his night stick and began beating the mans head and shoulders. Bang! Bang! Womp! Bang!

Policeman: "Now, do you want me to just slow down or stop!!!?"