Imagine the surprise of the motorist at a collision I once investigated. He parked at the side of the road, opened his door, and a passing car tried to tear it off! It's a good thing he didn't step out while he opened the door.
What went wrong here? The motorist didn't look first, or didn't see what was overtaking him. He probably felt safe in the fact that he had stopped close to the curb and was out of harm's way.