I just spin my mare..Someone taught her that it got her way if she flew backwards..and now I gotta deal with it (glad we havent run anyone over, come close a few times D: ). She's gotten a lot better with it..but there's times where it comes out of nowhere; I can't feel her tensing, her ears arent pinned, she'e not scared, etc. What I've done is just grab some rein and bring her nose up and around to my boot with leg cues for a spin and we just spin for awhile until she gives to my pressure and stops hanging on the rein I'm holding. Then we continue forward as we were before she threw a fit.
I've also used a whip..took my dressage whip with me and as soon as she started going backwards I applied leg and seat to cue foward..she didnt and got a nice whack on her left and we jumped forward, pinned her ears, and then continued on as intended. Posted via Mobile Device