In order of severity, I've felt horrible pain three times.
1. I was playing intramural basketball in high school. I had just scored a basket, and was running back up the court backwards to get on defense. I ended up tripping over the half court line, did a sommersault of some sort, and landed awkwardly on my wrist. I felt the pain right away. When I got home my mom made me ice it and tried to make me sleep with it for the night before taking me in to get it checked out. I thought for sure it was broken, it ended up being just a bad sprain.
2. I've had two hernias, both in my groin, one on each side. The hernias themselves weren't that bad, just a little tender and uncomfortble. It was after the surgery to repair each one where I felt terrible pain for 4-5 days until it started to fade away.
3. Since about mid-June I've had pain in my left hip. Went to the doctor to get it checked out. They did x-rays and found I have osteoarthrits, bone spurs, and impingement. Ive been going to physical therapy since August. I've also since developed bursitis on the outside of my hip. There are definitely times where I wonder if it would be better to just take the leg off, lol. Other times it's not so bad. It kind of ebbs and flows. Since the therapy started the pain from the bursitis has subsided somewhat, but the joint pain is still there. I'm probably eventually headed for a hip replacement. So my hip hasn't necessarily been the worst pain I've ever felt, but it is the most prolonged.