What’s the most physically painful thing you’ve ever experienced?

When i got my wisdom tooth taken out.
The process itself was painless, though it was extremely unpleasant. The tooth was very close to the nerve, and it didn't grow upward, it grew inwards towards the tooth next to it (breaking it actually). So to get it out, they had to dig into my jaw and drill it out.

It didn't hurt since my face was numb, but i did feel the process, i felt the digging, the shaking to get the tooth out, and the pressure when they pulled out the pieces of tooth after breaking it into pieces.

When the numbness faded away is when the worst pain i ever felt started.
I wasn't allowed to eat or drink for a few hours as i was told, and even later when i took pain medication, the pain was still there. Nothing helped.
All i could do was sit there in exaggerated pain, the only thing i was able to do was to get frustrated and angry about how painful it was and how there was nothing i could do about it.

I think the helplessness i felt was equally as bad as the pain itself.