Either breaking my head, my cheekbone, or my foot. All of them I did myself. My head, I fell off the stairs through the banisters head first. My cheekbone, I was on a trampoline, did a flip, kneed myself in the face, broke my cheekbone and gave myself a black eye. My foot, I was drunk and tried to walk to Camborne, slipped off a pavement I was balancing on, and walked everywhere on it because no one believed me it was broken. (Until I called my mum in the morning bc I physically couldn't walk on it at it had gone black). So yeah, pick your favourite.
when it's closer to the time, and I think predictions we're making now are pretty accurate, for example global warming, resources running out, over population, solar flares, they're all very likely in my opinion.