on the the range, you can bulls-eye fairly regularly, and start thinking you're a bad-ass. but even with routine exposure to gunfire and focused, expert drilling, you're still vulnerable to fear. it hits both the robber and the guard, and you can see what it does to their aim and footwork. They were at a distance of probably 3 to 4 meters, and many of the shots impacted the walls and desk.
when your boring daily routine is suddenly interrupted by gunfire, your hands can shake, you can fire wildly, lose focus, forget to fucking breathe of all things, forget to move, drop your weapon or forget the safety's on, forget to seek cover, or immediately panic and drop.
this guard's performance in this situation is exemplary. his choice of position at the corner probably saved his life, and it also pulled fire away from the bank employees. I wouldn't be so quick to criticize.