"One Good Reason, & You Go." joke

A man was driving home late one afternoon above the
speed limit. He noticed a police car with its red
lights in his rearview mirror.
He thought, "I can outrun this guy," so he floored
it and the race was on. The cars were racing down
the highway at 90 miles an hour.
Finally, as his speedometer passed 100, the guy
figured, "What the heck," and gave up.
He pulled over to the curb. The police officer got
out of his cruiser and approached the car.
He leaned down and said, "Listen mister,
I`ve had a really lousy day, and I just want
to go home. Give me a good excuse and
I`ll let you go."
The man thought for a moment and said,
"Three weeks ago, my wife ran off with a police
officer.
When I saw your cruiser in my rearview mirror,
I thought you were that officer and you were trying
to give her back to me!"