MONTREAL — A man is in critical condition in Montreal after falling off the roof of a moving SUV while performing what may have been a dangerous stunt known as car surfing.

The man's head struck the pavement when he lost his balance.

Police say they are attempting to identify the man, who is believed to be in his 20s.

Car surfing is a daredevil-style of acrobatics during which passengers perform stunts while riding on top of a moving vehicle.

Montreal police Const. Anie Lemieux says they are investigating the case as a hit-and-run and are trying to track down the driver.

Police went door-to-door at nearby businesses with the hope a surveillance camera may have caught the incident on tape.