Don't overdo it. How much it hurts and for how long depends on a lot of factors, but assuming that this is not a massive physical assault, it wouldn't be unusual to have a fairly minor reaction. It's not like every time you get hit there you are doubled over. Sometimes you get, er, lucky I guess you might say.
When it's bad, it can be baad. Like nauseated rolling on the ground kind of bad. But that's a once or twice in my life kind of experience.
