Hm, again, the "oomph" didn't feel as good as what I imagined when reading the novel. I guess its because they decided to go straight to a boot to the face, which is a weird posture to go to from crouching down. Would have made for sense for him to grab his face, slam it into the ground, then curb stomp his ass. Even when he pulls out the machine gun, you'd think the corpses would have some more bullet holes/be completely obliterated when shot from that close. Doesn't make sense for these guys to take less damage than the monster stampede that was literally erased. More bullets shot for the stampede, I guess.