Surprised it did so little damage, but running as it was would assist in the flip and damage reduction - perhaps. If standing still when hit or only walking, it may possibly had joined the driver inside the cab, due to the height of the vehicle.

The moose is seen walking down and out of the ditch on the left side of the film, after the accident.

The first MVA I investigated back in 1972, was a fatal VW-bug - cow moose encounter. The cow got back onto her feet, ran down the ditch and jumped the fence. She'd quite crushed the V-dub which killed the driver.