It appears like the grouping towards the end actually became closer. Where, in a panicked situation, one would reasonably expect that the rounds would be spread over an area.
Im deducing those rounds were aimed and deliberate.
Well, even if you dont listen to a single word he [Pistoirus] said, even if you just ignore what he was saying. Looking at the rounds in the door, one cannot reasonably say that there was no expectancy or foresight of hitting a human. When you look at the level at which those rounds were fired, he could fired into the ceiling, into the floor of the cupboard on the way to the bathroom or toilet. Lobbs Das Neves, International Ballistic Expert