Its a difficult one this. One the one hand, (thankfully) no harm was done to Chamakh, but it was, as said the kind of challenge that referees and the FA don't like, it was obviously a foul, but he came in from behind and went right through Chamakh, after the ball had gone, it was dangerous, because Chamakh could have been hurt if he didn't jump out of the way. Careless, unnecessary challenge, but tbh i was surprised it was red, I think it will probably be upheld, especially considering the physical approach Bolton brought to the game, a challenge like that seemed inevitable.