I'm sorry but you are wrong. People do react and behave in certain ways in certain situations .. and that is why we have experts in fields such as crowd management (via prediction of human behaviour), and also body language experts (because humans behave in certain standard ways they don't even realise they are doing and have no control over*). Even in the situation that Reeva was in can be accurately predicted, because it's what animals do when they are threatened .. i.e. they curl up and protect their main organs in the torso, and that's exactly what she did when she fell from the hit to the hip, she didn't put her hands to her hip as you might think she would, but instead she clasped her head and went into a fetal/protective position.
How do you think that people like magicians manage astonishing tricks? It's because of a standard way in which people behave, and a good magician will tap into that.
Abusers also behave in standard ways, too .. like I keep saying about the textbook stuff .. there are so many standard behaviours when it comes to the way they act and the things they say, it always feels to me as if they've all been issued with the same manual.
* and there will no doubt be one or two of these in court watching OP's body language .. (and it won't be all the throwing up and crying they will be looking for, either).