CLARKSVILLE, Tenn. -- An 82-year-old Clarksville woman was beaten by a 22-year-old man with an oxygen tank. His motive, police said, was that he was angry about a parking spot.

"It was a bad day," said Mary Hoekstra. "I'm terribly sore all over, all through my lower back and upper back and my legs and my hips."

Hoekstra needed some routine blood work, so her husband pulled into the Premier Care parking lot in Clarksville.

Neither had any idea they had just picked the wrong spot -- the one Joseph Fatula had his eyes on.

"This guy came across the parking lot just enraged and cursing all the way," said Hoekstra.

The woman said when she threatened to get help from inside, Fatula attacked her with an oxygen tank.

"He took it and just jammed me in the midsection with it, which knocked me back against our car, and, of course, when I hit that, I went and slid down to the ground."

Fatula is now behind bars facing an aggravated assault charge.

"He was an angry young man," Hoekstra said.

Police said Fatula hasn't been in trouble with the law before. He told officers it was in self defense.