Dinozzi landed face first. Man that looked bad. What exactly happened? Hard to tell
Marohn's horse stumbled badly and then everything went from there. His horse got run over pretty badly.. but may have been injured without that as he was going down from the stumble.
They were all midway to coming out of the first turn going gangbusters for positions, which made it worse than if it were on the straightaway with everyone in line etc.
Dinozzi really took it badly.
Horrible to see and certainly have fingers crossed that he and Buter come out of this, over time, OK and that all of the horses survive (although Marohn's horse really took some hits.)