A Canadian man’s fight-or-flight response was the former when a 300-pound black bear confronted him.

The Tribune News Service reports Rick Nelson, an Ontario native, was walking his dog July 3 when a black bear cub poked its head onto the path and yelped. Nelson knew what the yelp likely meant.

“I sat down on a log and the bear cub poked its head out of the shrub nearby,” Nelson told the Canadian Broadcasting Corp. “It was so close I could touch it. It let out a yelp, because I scared the heck out of it.

"I knew right away I was in trouble,” he said. “It's calling for mommy.”

Nelson told the news station he could hear the bear coming and started looking for rocks, sticks or anything he could use to defend himself. He was unable to find any natural tool, and soon he found himself staring at the mother bear in front of him on her back legs.

With any weapons, CBC reports Nelson, a former featherweight boxer, threw multiple punches at the bear.

CBC reports the first punch missed and caught the bear in the teeth, which cut up his hand. The bear responded by scratching Nelson’s chest and face.

“I knew it would swing first with its left but it would really come with its right, because most bears are right-handed,” Nelson told CBC.

Nelson then threw the punch his of life, landing an uppercut to the bear’s snout, CBC reports.

“(The mother bear) turned around and it was snorting blood. It looked at me, and I thought, ‘Oh no. Here it comes,’” he told CBC. “But it just turned back around and walked away like nothing ever happened and followed the cub. So I really lucked out there.”

Nelson’s legendary tale went to the next level when he confirmed with Huffington Post Canada that he didn’t go to the hospital, instead using peroxide and antibiotic cream at home.