Assume that average Joe dies in a zombie outbreak and is revived as a zombie pretty much immediately. How strong could that zombie be, assuming that:
- Zombification is done by "taking over" the brain, meaning that the zombie moves by transmitting signals over the same neural paths as a live human. It's just something else giving the commands now.
- Practically no decomposition of tissue has happened in the meantime.
- The zombie shows no constraints regarding pain, self-preservation, or the intensity of neural stimuli (meaning it can always go at maximum muscle power).
- It really wants to eat your guts.
With that in mind how much force can such a zombie exert to, for example, lift a boulder out of the way? It would try to reach the heroes and it does not care that it snaps its spine in half when doing so. The boulder just needs to be moved so the zombie (or another) could crawl through. How heavy could that boulder be at most?
And how would this ability compare to alive average Joe?