Pulling a trigger involuntarily four times would be abnormal.
Oscar is a gun nut. Gun nuts usually learn to use a gun properly, and one of the things you don't do is blaze shots off.
If it had been involuntary, I'd expect to see one or two shots and no more. The four is a deliberate action.
Absolutely. Two salient points are these: firstly, Pistorius had received extensive training in hand gun use - partly as a requirement for getting a firearms licence, and partly from his own additional private training. There is zero doubt that a) he knew exactly how to handle and fire the weapon he had in his hand that night, and b) he explicitly knew the law on when one can use a firearm and when one cannot.
And secondly, Pistorius actually admitted in one of his many-changing versions of events (can't remember whether it was in a police statement or in court testimony) that he took deliberate aim and fired the four shots off under full control of the weapon. That was the version where he was claiming that the "intruder" behind the door was about to open the door and attack him. It's only once (I would suggest) his lawyers got hold of him and had a good shake that he switched to - and maintained - the composite story that he thought the "intruder" was about to burst out of the toilet, but that the mythical sudden noise had made him reflexively and involuntarily squeeze the trigger (yeah, FOUR times......).
Wasn't the door locked?
He can't be in danger is the door is locked. He would hear it being unlocked before seeing the door even begin to open. I agree with the court that if someone has locked themselves in a bathroom, someone outside the bathroom cannot be in immediate danger.
This was a big problem for Pistorius. He knew that all the evidence proved that the toilet door had been locked from the inside at and after the firing of the shots, since he (Pistorius) had had to break down the door to gain entry to the room (as evidenced by the broken and splintered door panels). Obviously if the door had not been locked, he could - and would - simply have opened the door in the normal fashion once the shots had been fired.
Now, had Pistorius been mentally astute from the get-go, he could perhaps have claimed that the bathroom door really had begun to open just a tiny bit - and that it was this which caused him to fire in self-defence. He might then have just about got away with claiming that Steenkamp had reacted to being shot by pulling the door shut again and quickly locking it before collapsing. That would then be consistent with Pistorius having to break down the door to gain entry.
But probably in the heat of the situation (and since he had so many other lies to be thinking about), Pistorius set in stone the fact that the toilet door had been closed and locked throughout the whole episode. I suppose the thought might have crossed his mind that trajectory analysis of the bullet paths might in any case allow the state to be sure that the door was closed when he fired the gun - but actually I don't think the trajectory analysis would have been able to determine with certainty whether the door was closed or just ajar - given that nobody knew with certainty what the position of the gun was as the shots were fired.
And on top of that, I would strongly suggest that Pistorius knew very well that the door really had factually been closed and locked throughout. And that's because I think he pursued Steenkamp to the bathroom, and had already tried to open the locked door. Indeed, I suggest that the very locking of the door by Steenkamp - thus preventing Pistorius from any ability to exercise his control over her - was a major factor in the enragement that culminated in Pistorius firing the gun through the door (probably, IMO, exacerbated significantly further by Steenkamp announcing through the door that she was about to call for help - with all that that would entail for Pistorius and his image).