A pit bull is on probation after ripping the bumper off a police car and chewing the tires on three other cars flat as two other dogs barked and wagged their tails, local media reported Friday.

The brown and white mixed breed named Winston spent two weeks locked up in the Chattannooga, Tennessee animal shelter after the bizarre attack was captured on a police surveillance camera.

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His owners said they had no clue why he went wild that day, chewing through two fences and attacking four different cars.

He’d never shown any aggression before that day, owner Nancy Emerling told the Chattanooga Times Free Press.

A two minute police video posted on the paper’s website (http://www.timesfreepress.com/news/2010/mar/26/car-eating-dog-set-free/) shows Winston yanking on the bumper of a police cruiser, refusing to let go as it drives slowly back and forth trying to dislodge the dog.

“Keep your car still, man,” one police office can be heard saying as he drives up to the other cruiser in an attempt to scare the dogs away.

The bumper eventually rips right off and a brown dog grabs hold of it as Winston bounds away tail wagging and then drops the white bumper on the pavement.

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The two dogs and a big black one which had been barking from the sidelines then chases the cruiser down the road.

“I cannot believe they didn’t shoot him,” Emerling told the paper shortly after the March 14 attack. “I think that the officers showed amazing restraint. They could not have been nicer.”

Winston was eventually caught by an animal control officer using a pole after police failed to subdue him with pepper spray and a Taser.

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He was held for two weeks in the city’s animal shelter where he was described as a model prisoner.

A judge said she would drop a citation naming Winston a “potentially dangerous dog” after six months if he completes obedience training and doesn’t act up again.

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“The obedience training is going to be more like anger management,” Emerling’s lawyer, Jim Anderson jokingly told the paper.

The following video was posted to YouTube March 25, 2010, by the Associated Press.