The horse should have been pulled up and dismounted after the incident two flights prior because he could have been injured by it or had his confidence knocked, but he was encouraged to continue, and that led to the horrific fall. Let's also note how lucky the jockey is the horse didn't crush him to death.
Did you miss our previous article...
https://sportsvideos.club/horse-racing/thistledown-horseshoe-indianapolis-and-mountaineer-horse-racing-replays-on-16-july-2024