I liked that video. :] My horse likes to have the last word, and can occasionally turn into a bit of a bully undersaddle. The thing he'll most commonly do when he gets tired of something we're doing or wants to avoid working, is fling his head up in the air, almost invert his neck and ignore every single aid. When he gets like that there is NOTHING that will stop him but a one rein stop. He's getting better and better and I see this behavior less and less but he does still have it in his "i don't wanna work" toolbelt and will try to take advantage of you with it. I actually had to use this in my lesson yesterday when Zeus thought he knew the pattern better than me and tanked off in anticipation of the upward transition into the canter. I do exhaust all other aids and methods before doing this though, but sometimes you really just need to shut him down or he'll walk all over you.
Good informative video.