Had to look at these to make sense of what I'm being told.
Shot 1 could be independent of the sequence, but the other shots are a sequence and should be viewed 5 to 2, with 5 being the first of the sequence.
The shooter fixes stance + target, shoots, allows recoil adjustment (which slightly raises gun) just sufficient to move the shot slightly above (but still in the target area) then shoots again. So on, in a sequence.
A good shooter could do this while moving closer. The shooter does not change their shoulder/arm/grip stance at all.
It's about timing. You have to know gun timing - more specifically, the recoil of the gun you are using - to get this arc.
Or you are very very lucky.