Avram in MD – I already answered your point. See my earlier post with Lulav.
notasheep – so the other person had an aisle, you had a middle, and expected him to switch for nothing? Don’t you know that people often pay for an aisle or better seat? (and certainly in the first row, where there is more leg room). If you really cared, then you would have come to some mutual agreement, probably involving getting him another aisle or compensation. The problem was that you expected something for nothing.
Truthfully, who cares who is “causing” the issue. He had something you wanted, you should have offered him something in return if you really cared. Perhaps it was your “Magiah li” attitude (I wasn’t there, so I don’t know) which caused him to act as such. Maybe it was a crying baby, or a baby in the way of his expected leg room. Maybe he broke up with his girlfriend. Maybe he wanted to be Over the Issur of Histaklus with you. Who knows. End story, you obviously didn’t really care, because otherwise you would have done something about it.