If that horse ever hurt somebody else again, they'd have it on their consciences, but the owner would be set up for a big punitive damages verdict.
That's the "One Bite Rule".
They didn't own the horse? Oh, well I agree then. He would have been dead before they could have even thought about it.
All Jr's guilty of is tumbling on over a jump gone wrong. There's a lot of acts of malice horses can be guilty of, but that accident isn't one of them.
So people were warned to give him a wide berth in the aisle. Lots of stallions can prone to biting, particularly if they're bored in a stall and kids might be likely to go give him treats if they weren't warned to stay away.
There were two people at that farm who had permission to handle him. At a barn full of lesson kids, I don't see anything unusual about that. Doesn't mean he wasn't good for anything but Alpo. Jeepers, ladies!