My friend a retired stand double for films, said there are classes today, a person can take to learn how to fall without hurting themsleves but it looks like you are injured. Another way is learn like he did when he was younger, by trial and error and listening to the old timers. If JH took any martial arts classes he would learn ways to fall to prevent injury and then there are video clips on the Internet....any tumbling videos may give give ways to fall to prevent injuries.
No head injuries seen, no bruises on head or face, the rest I know can be faked. I worked for years with behavioral teens....oh, they coild fake so well. I do wonder how much of this was a ploy to pretend he had mental illnesses to say he was insane. This happened too long after he made the decision to kill. I hope the jury picks up on it.
I also think the defense is really trying to knock down the number of alternates in the jury...slowly. Maybe trying to call a mistrial because there are not enough jury members when deliberations start. Am glad the Judge had so many alternates, but I still do not trust the defense.