

It really depends on the state. Quite a few people have been killed by being sucker punched. So if you punch someone out of the blue they can say they feared for their life.
And breaking legs, the amount of force depends on the person. My daughter broke her own legs twice just by slipping on a stair a little. What if they’re carrying a retractable baton and when you punch them they hit you in the knee with it? Not unreasonable in a lot of the US.

It also depends on where and other context. If it is an old frail man or a woman being punched by a dude twice their size it absolutely can be. I also said it depended on the state and I said maybe. I’m not spreading false information.