hehe, to be honest, its not a red at all, ref is a complete donkey, but some players really are daft and don't play, safe. When you're a huge guy and stocky, going on hard on someone is riskier than a smaller guy so realistically he shouldn't have made that tackle, still not a red though.
Ref I think has seen it with the Norwich player blocking it as a slight jump into the tackle, ref's are dumb, there is a difference between jumping into a challenge and hitting the floor, basically every tackle the player will be off the floor at some point, the real thing is where you are off the floor and where you land. You jump 5 metres from anyone and land 5 metres from anyone, not a red, you jump in and land on the player, its a red, you tackle and land before the player/ball, its not a foul.
Hudd was off the floor, but landed before he hit the player, and both his feet were low, it was an unlucky hit on the other player, nothing more or less, don't even think it was a yellow.