Not only that but if he was blowing up for the foul, was it not last man and a red for the first one?
To be fair he blew his whistle when both players were on the floor - normally what happens is one player rolls around like he got shot and the other looks at the ref with puppy dog eyes protesting innocence. Is rare that players actually acted like men. It was in the opposition half - is only a last man red card if it happens in your own half.