This story already happened on Tuesday but I'd still like to share it.

I'm working part-time at a place out of town, ca. 10km from home. After work I usually go mapping in that area and this time decided to map a village called Völkenrode. So I cycled a few kilometer further apart from home, started mapping the southern part of the village and moved farther north. Having reached one northern corner I saw a track leading to a railway-crossing in the distance (allready dark outside). So I went there, drove a few meters along the attached tracks and realised a bridge in the distance. So I went further to map that bridge. From that bridge I saw another railway and went off again.
Shortly behind that railway my saddle felt kind of strange beneath my ass. So I went of the bike, and within seconds held the loose saddle in my hand. The pipe attaching it to the frame was broken! There I was, about 20km from home, in the dark and cold, apart from any civilisation (let alone a bikeshop) and unfinished mapping.
So I had to finish mapping and drive all the way back home standing. Man, that sucked!

(You can see the track very well on the map)