I'm female, and I don't believe I've ever cried due to physical pain. It's not that I'm not sensitive to it, I just more often respond with swearing and anger (if it's relatively minor) or trying to figure out what to do about it if it's a big deal. I think I've just always been rather good at compartmentalizing that kind of anxiety.
The worst pain I've ever been in was the second time I broke my kneecap. The second worst pain was the first time. I didn't cry, I did swear a lot though, and then had to hop all the way across campus leaning on my friends shoulder to get to the car so I could go to the hospital. Not fun. But I was mostly annoyed, not weepy.
I don't really understand the reaction to cry when in pain. It doesn't make sense to me. Anger is an understandable response because pain naturally sends you into a state of fight or flight and you're preparing to defend yourself. Crying however seems weird to me. I suppose its a call for aid from the rest of the herd? But really, sucking it up, getting the tree off your leg while you're adrenalin is still high, and getting to a medical facility seems more helpful to me. That's not meant to be a judgement on people who do, of course, sorry if it sounds that way. I just mean that personally it doesn't make sense.