When I was a kid, had a huge wart on my foot, so I took some scissors and cut a patch of skin including the wart itself.. but it grew back, so It obviously wasn't deep enough, tried again about 4 times with scissors and cutter, and I cut it quite a bit deeper to make sure it didn't grow back.
Theres also one time when I was running barefooted, and when I got home, I realised I had a huge chunk of wood thats stuck in my toe sticking out at the side, pulled it out myself.
Theres also when I was running whilst wearing shorts through an opened wooden gate, and the wooden gate for some reason had a concrete nail sticking out of it, so the side of my knee got stabbed and it slashed all the way through the back of my leg, could see the bone.
also
broke a rib and knuckle
got stabbed by a pen through my upper abdomen
got smacked in the face by a knuckle duster
lost my toe nails a couple of times
cracked my finger nail on my middle finger and index finger with a hammer
had about 1/2'' of someone elses finger go in my eye and injured my eye with his finger nail (made my eye swell really bad for a couple of weeks
accidentally cut my wrist with scissors
had internal bleeding which made me **** blood and eventually, dried blood (chunks of it coming out)
cut my fingers a couple of times with a kitchen knife
cut about 1/4th of my thumb at the side with a machete (could see the bone)
twisted my ankle
had alcohol poisoning cause I drank about a whole case (12) of 500ml redhorse beer non-stop, all bottoms up one after another, (couldn't see anything, couldn't think much of anything, felt like no air coming in my lungs, couldn't feel my whole body), but still managed to walk home, sleep it off and felt great in the morning without hangover

an oven exploded infront of me as I tried to light it (gas had been on for hours) and lost almost all the hair on my body
poured boiling water on my lap which included my private parts.
4x4 ran over my foot and parked on my foot for at least 1 minute, didn't notice it until I tried to walk, so I just stood there, looked at the driver and explained the situation calmly, after that he drove away from my foot

FREEDOM !! lol
all of these did not cause much pain for me (most of them, I did not feel at all.) except for the ****ing blood bit, the injury to my eye and the boiling water bit. but I'd imagine that they would be considered quite painful.