At 5:45 or so, the camera focuses on the horse's trainer, Ian Wilkes. Beside him is a woman, probably his wife, who so reminds me of myself. Not in looks, but in behavior. I would be just like that if my horse were winning -- arms pumping, screaming, clapping, jumping up and down. Yeah!
If your heart is racing, your breathing is ragged, you're screaming, "Oh, God!" over and over, and the whole thing only lasts around 2 minutes...it's probably a horse race.