It's a toss up between a few actually. Although number four was probably the worst.
1) I broke my little toe walking into a bed post. Four toes went on one side of the post, my little toe went on the other. It wasn't so much the pain as it was feeling the bones rubbing against each other whenever I walked.
2) When I moved into my new student house last September, me and my housemate found one of the sofas to be full of maggots. Thankfully it was by the back door already so we chucked that one out fairly easily. That one and another had been brought in by the people that lived there before us and because of the state of the first, we decided to get rid of the second. So the next morning (after literally the worst nights sleep I have ever had, I was using a sofa cushion for a pillow and my leather jacket for a blanket, was wearing my jeans under my pyjama pants and still shivered most of the night) me and my housemate carried the other sofa downstairs and threw that one out too. I wasn't too bad for the rest of that day, just kinda tired from lack of sleep and travelling back to the family home. But the next day, I could barely move at all without being in pain. I couldn't bend my back so if I wanted to pick something up I'd either have to bend sideways or stretch my arm as best I could.
3) From last September I've had achilles tendonitis in my right leg. Absolute agony with every single step. I lived half an hour away from the uni campus so had to limp there and back every single day. I put up with it for two whole months before I eventually went to the doctor. They put me on painkillers which eventually made the pain go away. Then in February, it came back. What did the docs do this time? More painkillers. I really hate the NHS sometimes.
4) In what I believe was related to the tendonitis, last November, about a week after I got the pain in my foot to stop, I got the most awful pain I've ever felt in my back and sides. It started as a slight backache on a Sunday evening but by the following Friday I literally could not move. If I knelt down, I couldn't stand up. I couldn't reach to take my shoes off. I couldn't bend my back. Out of everything, that's the pain that made me cry. My housemate took me to the surgery about five minutes away from my house. What did the doctors tell me to do? Take more bloody painkillers. And it didn't help that the next day I had to help with the set-up for a stage show. Thankfully, my friends tried to keep me from doing any heavy lifting.
EDIT: Error message saying you must have posted since you started writing this post. You don't say?