My personal worst was the first time my back went out. I was at a Christmas party at a friend's house. I was washing my hands at her bathroom sink and I coughed. The pain was was like a lightning strike down my back through my legs. I suddenly felt like my back was collapsing on itself and my legs were unable to support me. It was terrifying too because I'd never had back problems so I didn't know what was happening! I tried to sit down as gingerly as I could but even that was horribly painful. I ended up hobbling to the living room to lie flat. Some of my friends thought I was faking, and that really pissed me off. Getting into my boyfriend's pickup was agonizing and I could barely get in. Every position hurt so much I couldn't believe it. It's gone out a few more times over the years, but that first time was so scary, it was the worst. Your story and the motorcycle one are pretty messed up! Good post idea!