Either way would have ended the situation. Part of me is thinking about what he learned from it. You'd like to think he learned (from your choice) that the world isn't about who's toughest and he doesn't need to act that way. I doubt it, that's a new worldview.

The pissing blood option would have reinforced his worldview - which wasn't going to change anyway - but maybe he would have learned that he's not the biggest dick at the sausagefest and adopted a more Beta outlook (to mix metaphors).