Notv at all. The Derby particularly recruits very young stock just getting used to racing, and most of them are unGELDed stallions stallions who smell enemy stallions all around them... Or mares to fight for.

In this case, the horse startled at the noise, veered away from it, and swung into the path of others coming on strong for the finish. His jockey-- those peeps are STRONG-- expertly brought him about his spot, but he other jockeys were lucky they didn't all pile into each others' heels. It could have killed people and horses.