Hi guys! I started up Diva's training again since her leg is now fully healed(Such a relief! ) and she is back to her old sassy self. but now she has developed a bad habit of rolling and bucking while practicing groundwork in her harness. She thinks that every time she comes out of her stall/turnout that it is playtime no matter what we are doing and no matter what I try I can't get her to see the difference between work and play. I have been taking things slow but she just gets this mischievous look in her eye and I know I'm in trouble. She is playing with me, and we both know it. When she bucks I will give her a light pop in the mouth with one of my reins and her bit and when she rolls I will smack her rump with my crop and encourage her to move forward. She just stops and looks at me like 'What? I didn't do anything....'. I am afraid that one of us could get hurt if she rolls and gets tangled or if she bucks and kicks me by accident. Sometimes I lunge her before I harness her to let her exercise then I will put her to work in the harness if she seams overly hyper. I have tried everything that I know how to do and I have run out of Ideas. I feel so mean right now for punishing her but I don't know what else to do, please help me! I am using a standard harness with a padded tree, a lightweight western headstall without nose band, and a snaffle driving bit.