I've broken a few chains. I think they've always been within about a mile of home, but I try to remember to bring a chain tool with me.
Broke deraileur cables... and was able to limp home.
Hmmm... lost my RD years ago. Just eaten by the spokes
Was up playing around on a 20 mile hill climb when my front brake cable started disintegrating. I don't think it completely fell apart, but I didn't have much stopping power left.
Severely bent rims before, I think the last time was falling into a road crack ad dusk... After that, I always thought of my Wolbers as Wobblers!!!
Oh, and the last time I tried hands-free riding, my front wheel flipped 90 degrees... I went over the handlebars, and had a good walk back home.