CHATTANOOGA (WRCB) -- Police are on the case of a bizarre car theft in Chattanooga.

A passenger, sitting in a car at a gas station, finds himself the victim of a carjacking.

It was a carjacking with a surprise for the bad guy.

His next surprise could be police knocking on his door because you made the call to catch him.  A reward is waiting.

"He had the suspect by the head.  Not real sure what that means," says Chattanooga Police Sgt. Scott Bales.

It means in this case, at least, one of the victims got a few shots in before the carjacker fled.

About two weeks ago, on the evening of June 20th, a white SUV pulls up at the pump at the
Sav-A-Ton gas station on Rossville Boulevard.

The driver and front seat passenger head inside, they leave the engine running.

That's when police say the suspect got involved.  He took notice, apparently thought it was Christmas morning, jumped in the driver's seat and took off.

"Well, he was just thinking he got away with a free vehicle that was running.  And the other victim that was in the backseat immediately got up and surprised him and began fighting him," says Sgt. Bales.

The bad guy didn't count on that other passenger and he obviously couldn't fight and drive at the same time.

"Well, the suspect had both a knife and a hammer," says Sgt. Bales.

To no avail, from the back seat, the victim yelled and fought and disarmed the carjacker of both the weapons. Even hit the thief in the head with the hammer before he crashed the SUV in the 2500 block of East 40th Street.

After the wreck, the victim was able to get away but so was the bad guy.

That evening, eyewitnesses who live in the neighborhood told Eyewitness News the suspect mowed down a stop sign and went speeding down a side walk, barely missing a 14 year old pedestrian.

Police are hoping someone will recognize the man in a t-shirt and jeans 

The suspect looks to be a 20 to 30 year old white man with dark hair, perhaps around 5'10" tall. Officers believe he was probably injured in the wreck.

If you have any information, pick up the phone and call Crime Stoppers at 698-3333.  It's confidential, and you could get a cash reward.