The ref has had a shocker here, Chieck is about a foot taller than Niall ThompsonI can only think the ref got Cheick mixed up with Niall Thompson who was booked for kicking the ball away earlier in the game. Bit embarrassing for the ref I should think as Thompson had just been subbed (for Ellis Johnson) a couple of minutes before sending Cheick off.
Edit: Looks like Cheick didn't go quietly which is understandable.