I don't have a problem with this BUT there seems to be some other stuff that went on which needs to be explained by UA.

Like what happened to him the first time he was taken off and returned all battered and bruised.

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Similar thing happened to me in Joburg last year...British Airways flight back to London was overbooked and I was told at check in that they fuc ked up and I'll just have to keep checking back to see if there was room or they would compensate me. Ultimately missed the flight but there was leaving an hour later and they bumped me up to Business class at no extra charge. It was pretty sweet..