It depends. If the pain happens whilst I'm doing something, I'll just ignore it. If necessary, I can simply ignore quite high levels of pain. I don't view pain as something to run away screaming from, it merely tells me that something is happening. If it hurts enough to be threatening, I trust my body to react automatically and get whatever is hurting somewhere safe.

Having said that, if I just stub my toe or something else that happens with no future goal in mind, I'll make a big fuss. Possibly because I find it funny, but I'm not really sure. I rarely understand my reasons for doing things.