You guys need ****ing counseling, you really do. If you watch the start of every race in America you will see what you describe. Happens in claimers, MSW's, and allowances. Its impossible to put 5-14 animals who weigh over 1000 pounds in quarters that tight and ot have bumping and banging.
Get over it. The horse broke his leg and we will never really understand the why and how. Its really time to get past this. I want the horse to live and think good thoughts for him often, but I think its a topic that has really been beat to death.