Well, let's see. Horrible pains one would experience in the course of normal life.
Childbirth. Having every muscle in your body seize up and attempt to expel a 10 1/2-pound watermelon-shaped sorta thing is nobody's idea of a good time, particularly when it happens repeatedly over a period of eleven hours. Thank God for epidurals.
Gallstones. Like being stabbed under my sternum by a flaming dagger. Worse than childbirth, I think, because childbirth has a purpose to it. Gallstones just hurt.
Throwing my back out so badly that I was bedridden for two months, unable to move anything but my arms from the elbow down. Good times.
Waking up from gastric bypass surgery with an incision from my sternum to my belly button. You never realize how much you use your back and abdominal muscles for almost everything you do until those suckers are screaming in pain.
As for the stubbed-toe people, I ripped the nails completely off of both my big toes as a child. Horrible, but nothing compared to any of the above listed.
And yeah, mental anguish and despair is the absolute pits. At least with physical pain, clearcut treatments exist. You can get surgery, or medication, or pain pills at the very least. Mental and emotional suffering are a lot harder to cure.