I am not sure if this makes sense or not, but I was getting a lesson from "the trainer" on a different horse, who had just been gelded a few months ago. A mare walked by and he started whinnying. It wasn't that bad to where he was like rearing and pawing just turned his head and whinnied. The "trainer" takes the rope from me and shakes the lead rope to get him to stop. He stopped but started up again a few seconds she starts lunging him, he still whinnies while lunging. She gets mad yells at me to take the saddle off him, and proceeds in lunging him kicking him in the chest and daring him to rear so she can flip him.
I could understand if the horse was being bad like pulling on her and such. He's young and doesn't have much ground manners to start with, but he didn't do anything at least to me that would justify this.
Since I am learning so much here was this action necessary? If a newly gelded horse whinnies do you correct them?