<human>: Could you distill the essence of the text into 1-3 sentences?

So a little backstory first. I was hit by a van about 2 years ago and damaged my knee. Nothing too serious but anytime I put any pressure/force on it, I get a lot of pain (e.g. I can't kneel on hard floors).

On monday, I went to the free weights room in the gym for the first time and had a nice workout session with a friend. The downside was that my legs (and other body parts) were killing me. I didn't think it was going to matter too much and I just powered through the last two days.

Today however, I was walking along the pavement and had move out of the way of an oncoming pedestrian. Being the child at heart I am, I decide to balance on the curb. That's when things start to go wrong. Whilst trying to dismount, my legs buckled and tripped and skidding on the concrete tearing my suit trousers

After reassuring onlookers that I was fine, I went on the hunt for some new trousers. Unfortunately I'm not being paid for my internship so the majority of things were well out of my price range. After limping around London's financial district with torn trousers, I eventually found a nice pair of trousers to try on. Once I hopped into the changing rooms, I found that I was in fact bleeding and had been doing so for the last hour. After buying and changing into the new trousers I had to pick up a wound dressing to stop myself being infected and spent the rest of the day limping around without being able to bend my legs
<bot>: I tripped and fell, messed up my already dodgy knees, bled for a bit and had to buy things with money I didn't have