fbw,
What gives you (and your tall friend) the right to give this passenger a "huge bollocking"?
As was previously mentioned maybe he needed to go to the loo urgently?
There was no need to embarrass this individual in front of everybody else. I put it to you, that a better tact would have been to take the individual to one side (after landing) and explain to him calmly the pros and cons of getting out of ones seat just before landing.
To some of the other posters,
Some of you seem to take great pride and satisfaction from; getting individuals "banned" from flying and getting them "taken away and detained". Come on guys - bit over zealous.
L.