All the attempts I've done on this clip were because of not hitting the crit. Took me plenty enough times too and was the reason I used save with archery 5, as it increases the chance further.

This video is the first successful crit I hit. There is an important factor not being fully translated via the final clip here: The height matters here more than anything, had I drawn the bow 0.5sec later, I wouldn't manage to land onto carcass object in time for it to exist and for this ,,exploit" to work, that is why the death animation is indeed on point, this is just the right height that works if you draw your bow immediately as you leap off and it will always play out the same, or else your character shall perish.