I have a 7 year old OTTB. recently we got into an accident, we were trail riding with a group and she started to speed up. i pulled back on the reins and said woah but she kept speeding up. i went to turn her in circles and she yanked her hand down, pulling the reins out of my hand and ran back down the hill. long story short I couldn’t get the reins back and flew off. anyone have any tips to get her to stop?