I think that Linda did the right thing in this video, at the beginning the horse wasn't given an answer but that was the student and not Linda. When Linda had the horse she was giving him an answer and she was getting very big and not giving an answer right away but it looked like the horse new better and already new how to back up with a wiggle (if he was just learning to back up then im sure Linda would have used her phases more also I'm sure she would have given the horse an answer right when he stepped back)
I was looking at the results and the results I saw was a horse paying more attention to Linda then he was before and the horse was backing up better.
Also I think some of you might be taking pity on the horse because he is a one- eyed horse (would you be reacting the same if he had both eyes?) and Linda was doing everything where the horse could see her also one-eyed horses can do the same as any other horse, they shouldn't be treated differently. (remember I said some of you, I don't want anyone to take this personally so just a reminder)
One last thing, some of you said your horse can back up with their chest, nose, voice cues or hand movements but a horse should be able to back up with everything that includes nose, rope wiggling, chest, tail, hand movement, voice cues and anything else you can think of. The hand cues is the driving game and the other things are porcupine, I recently asked a trainer why we need to teach the porcupine game if a horse can already do the driving game perfectly and she had a really good explanation, Ill try my best to explain it to you guess but I forget what the wording of her explanation was (she is super good at explaining, saying and wording things but I am not) anyway she said something like - they are two different games so they are separate and all the games are important for a horse to know. You will need to rely on the porcupine game as much as you will rely on the driving game - sorry if that doesn't make sense I don't really know how to explain it I wish I remembered how the trainer explained it.