I remember watching a series/movie (or maybe even read it on a manga – possibly Gantz, but I am not sure) where the villain just grabs the hero, who doesn't want to kill innocents, and uses him physically to kill others.
At one point, they fly through a subway and the villain just uses the hero to tear people apart. The villain holds him and uses him as a shield as he breaks through the cars of a subway; as people collide with the unbreakable hero, they get torn apart due to their regular bodies.
I think it was animated, given the gore involved, but it is just a vague memory I have.