Your story leaves me speechless. The person who did that is beyond obnoxious. What did he think you were going to do? I guess he was hoping you would be on of those unassertive people who would just suck it up and sit in another empty seat. If it happened to me, I'd have to take a few seconds to get over the shock that someone had down that. It just not something I'd expect to happen on a plane.

Did the person pretend it was an accident? I'm just curious how he responded when you told him to move.