Ok-some of the time she is saying whoop-but there are several times she is saying "ho" She is definitely asking him to stop or transition down in gait several times when she says it.
I also will ask if it is typical that these horses go so fast through the barn? I think that is rude, frankly, to go running past other horses in their stalls. I have been to lots of shows and never saw that.
Regardless-not my taste. You couldn't pay me to ride one, or even own one.
No worries here! I doubt you would get many offers.
And yep. There are many barn set ups where the barn aisle is also used for under saddle work. There are some set ups where the stalls are in the middle with a work track around. You have some where the stalls are on either side, with the workway in the middle. And then you have the "normal" barns with the section for horses and stalls, and various separate work areas. Usually based on how much money the barn owner has. LOL!
Either way, generally speaking, a horse working at full tilt, even with people on the ground shaking whips and making noise isn't going to phase the horses in the stalls. The horses at this particular show would have to be having a really off day to freak out over another horse working, as this is the World Championship Horse Show. 99% of the horses have been off the farm a couple times and have seen the bustle.
As for Whoop and Ho, he did calmly stop and stand at several points during the class. Which does tell a lot about the training and handling. Not all are like my pony who will go from show trot to stop in a tenth of a second. As crazy as it sounds(being literal not sarcastic), the gaits are what matter and not the transitions from gait to gait. If you aren't in a pleasure class, you don't even have to have a legitimate walk. You can even struggle a little bit getting into your gait, you can break gait, make mistakes, etc and still have a chance if your horse is good enough. Best to not do those things for long, or in front of the judges, but yes.
Unlike a lot of other breeds/divisions where every little thing is scrutinized. "He took two half steps when asked to stop. DISQUALIFIED!" Haha.