Of course now it was a little more motivated, and the stun doesn't last long. Still, Hal holds his ground, trusting Psii to get him the power he needs before his life is in danger. There wasn't really anywhere to go but back up anyway, and he didn't want to move this into a public area.

As the zombie regains itself a bit and launches at them -- not entirely the slow and shambling variety then -- the strategic choice of behind the dumpsters pays off in slowing it briefly, which is the time Hal needs to release the second attack, aiming once again for the head.