Sing to her. Seriously, though. When I'm in a spot where I feel something may spook the horse, I talk, talk, talk to them or sing. Singing is good because you can sing a slower song with a nice, even tempo which will help the horse relax. You'll also tend to relax, partially because you will feel really silly singing to your horse. Don't sing heavy metal or the like, though.

ETA: I have a few more suggestions, because you said it's primarily arena based, but I don't have time to post them right now.

Last Edited By: 4Horses and Holding Mar 3 08 1:04 PM. Edited 1 times.