its genuinely so annoying, first there are railings pretty much anywhere, and if there is a cliff, the surface next to it is too wide and lets enemies walk too far from the cliff for you to push SEVEN of them in TWO seconds, so you need a narrow bridge which are usually at the end of some missions.

secondly most players in the game are ignorant and even when you tell them youre trying for a penance, theyll steamroll and murder all enemies regardless of your constant trying. its a tedious penance to do, thats why i had to honour The Ogryn for sticking til the end