He seems to think at one point around 0:03 or 0:04, "Gosh, I should run off to the side", but then he decides "No, all I have to do is run into this open door. It won't follow me into a building, surely."
For the same reason I hit a fence 20 feet in front of me the first time I tried to ride a motorcycle. Rational thought is hard to come by when you're dealing with impending pain.
The same thing happened to me my first time on a dirtbike. Watching people wipe out their first time on any kind of motorbike is hilarious because I guess the natural human reaction is to gun it rather than brake. Or steer.
When a predator is chasing it's prey, changing direction only gives that predator a chance to catch up. When you think you're gonna die it can be hard to remember that a van is not a predator.