"It's very easy, I open my house door, then my car door, then get out and move the car manually, then close my house door, then move the chairs back, then eat some dinner, then murder the hitchhikers still trapped in my car, then watch some telly."
Seems like he leaves the car in there in neutral with no handbrake, so that's an accident waiting to happen.
I was thinking he might trip getting in or out, the car would roll a bit, enough to pin him against the house door frame and then he'd end up having to sever some part of himself like in 127 hours. It could happen! (maybe)