A player who realises that the ball is going out of play and then drags his left foot from Shepherds Bush all the way into the penalty area so that he makes contact with his opponent should never get a penalty --he did a Harry Kane, Delli Ali etc. in order to try to manufacture a penalty and he failed, mind you, he fooled lots of our fans too who think that this should have been a penalty.
Likewise, Jack Cork did nothing wrong and he was not fouled, however, the referee thought that he had been and we got the free kick. Unfortunately, this is what happens in a contact sport ---some you win and some you lose ---that's football.