Matt Mellenthin was making his way down the Mount Aire Trail Sunday when he came across a bull moose and a female moose in a clearing, The Salt Lake Tribune reported.
The bull moose started to charge at him, but then stopped short and circled to the female.
"In hindsight, I realized I should have taken off then," Mellenthin said.
Instead, Mellenthin pulled out his cellphone to take pictures and video footage of the moose.
The bull moose again charged at Mellenthin.
"I was totally unprepared for that," he added. "He'd already bluffed and circled around."
The man stumbled back into a tree and unsuccessfully tried to climb up it. The moose stomped Mellenthin's lower back.
Mellenthin was able to escape when the moose turned away from him.
"I gained my senses and realized I was functional," he said. "Then I took off."
Mellenthin ran down the trail away from the moose. He escaped the attack with just a few bruises.