The Barnes incident was very odd. Firstly he was half tackled the ball went out, both players were on the ground about a metre apart. Barnes appealed for a corner, it wasn't, the Watford player jumped up and attempted to wrestle Barnes to his feet by his neck, Barnes grabbed hold of the Watford's player's leg and sort of slam dunked him to the ground. The Watford player was the one who lost it, for no reason at all. Funny thing was the game re-started with Watford keeper taking a free-kick outside the 6 yard box, WHY? Possibly the ref missed it as he was running up field.
It wasn't quite as you report, Barnes went down looking for a penalty and was appealing for one, Pudil tried to pull him up by his shirt and Barnes went ape, he grabbed Pudil and throw him to the ground and according to the laws of the game it is classified as violent conduct and a straight red it wasn't a difficult decision to make but nothing surprised me with that official