Who says all his rounds landed where intended?
It’s not that difficult to put a fair number of rounds into a target that size.
Have all of you fired full auto as a job?
In an hour say 400rpm 60 mins 24,000 possible. Realistically he fired 8-10 k. He let’s say he hit 400 the rest is stampede injuries. The people in front were fenced in. Geez