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A grizzly bear feasting on an elk carcass charged a bow hunter in Montana and attacked him, slashing a 16-inch (41-centimeter) cut in the man's head that required 90 stitches to close.

"The bear just flat-out charged us," said Tom Sommer, as he recovered in a Montana hospital on Tuesday afternoon. He said it closed the 30-foot (9-meter) distance in 3 or 4 seconds.

"It bit my thigh, ran his claws through my wrist and proceeded to attack my head," Sommer said. "I could hear bones crunching, just like you read about."

Sommer said he and a hunting partner were looking for an elk they had been calling Monday morning when his partner spotted the grizzly in the southern end of the Gravelly Range, just north of the Idaho border.

His hunting partner unleashed a blast of bear spray, which slowed the bear's charge. Sommer said he grabbed his canister so quickly that he couldn't release the safety and he couldn't afford to look down as the bear closed in. He ran around a tree twice and dropped his bear spray in the process.

Sommer then grabbed his pistol and turned to confront the bear.

He still had his pistol in his hand and was going to shoot the bear in the neck when it swatted his arm down, Sommer said.

"Just like that it stopped. He stopped biting me, he got up and started to run away," said Sommer, who splits his time among Idaho, Missouri and Florida.

His hunting partner had been able to deploy the rest of his bear spray, ending the attack Sommer estimated lasted about 25 seconds.

"It could have been a lot worse," he said.

Sommer found his bear spray canister. His hunting partner had some blood coagulation powder and they made a turban, stopping the bleeding after about 15 minutes.

They walked a mile back to their camp and rode mules another 4 miles (6.4 kilometers) out to their base camp, followed by a 2-hour ride in a pickup truck to get to the hospital in Ennis.

"Through it all I was very conscious, very level-headed and low key about it," Sommer said. "Besides some scars, it doesn't appear that I will have any problems."

"I've been a hunter my whole life," said Sommer, 57. "I have no grievance against the bear. He was just doing what bears do. But I would have shot him just the same."