A man who fell into the Willamette River from the Steel Bridge in downtown Portland Wednesday afternoon told his rescuers that he was practicing the sport of "parkour" when he missed his mark and plunged into the cold water.

Police identified the man as Glenn R. Wallis, Jr., 24, of Northwest Portland.

Stephanie Adams of the Portland Fire Bureau, said Wallis was trying to jump from one point to another on the bridge but missed "and went off the bridge" after missing a railing with his feet.

Officials said he fell from the pedestrian walkway that connects Tom McCall Waterfront Park to the Eastbank Esplanade. The walkway is about 20 feet above the water.

Adams said Wallis was evaluated by medical personnel at the bureau's Station One on Southwest Naito Parkway but did not appear to have suffered any serious injuries.

"Just extremely cold," she said. Wallis declined to be transported to the hospital and after about 15 minutes walked away from the ambulance wrapped in a blanket. He apparently lost his shoes in the water.

is defined as a "physical discipline which focuses on efficient movement around obstacles."

Those who take part are known as "traceurs" and move through an environment by vaulting, rolling, running, climbing, and jumping.