Why was she yelling, you ask? She wasn't a heckler or a drunk, she was their riding coach, and she was yelling instructions like- "Less rein! less rein!", "Up to the fence, Get up to the fence!", and best of all, "Relax!! Relax!! You Have to RELAX!!!" at the top of her lungs.
And these were not kid's classes we were watching- these were adult riders. Most of the riders she was "coaching" looked resigned but at least one looked as if she wanted to kill her.
I thought Soccer Moms were bad... I wonder how much those riders were paying her to scream at them.