My favorite reiner wil forever be Gunner

http://youtube.com/watch?v=NzoHT3hwfCM

It may have already been said, but I think reiners ride like they do to mostly stay out of the horses way. They're supposed to respond to the lightest of cues, both leg and hands. That's what first came to mind about the video the OP posted; that horse is only 5, so he/she's pretty young, and the rider might have been trying to stay out of the way.

...or she just has a funny way of riding

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