To be fair to the OP, I sit in the East Upper, close to the away end. (Some of) their fans cheered when he went down, he signaled that his hamstring had gone & he needed to come off. Their fans (the ones at the back) had booed his every touch up to that point. They were initially pleased when he was going off (not sure if that was boos or cheers, but I thought it was harsh), but as he went past their fans the vast majority of them gave him an ovation, and he reciprocated.