Is the jumping in this video bad?

Okay, so I know zip about jumping really, I've seen it done and it looks fun but I know its risky. So anyways, I found this video and I saw that alot of the people look like they have horrible position or the way they land, or are you okay to do it like this? Especially at..0:14,0:46,0:28. I thought the person at 1:16 and 1:34 and 2:20(not the car part just position) looked decent though. Don't be rude please, I already said I know nothing on jumping.

What points in the video would you say have bad jumping (on the horses behalf) and bad riding?
I know alot of the jumps are dangerous.


http://www.youtube.com/watch?v=Nx9vPfUi7hk&feature=related
 
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