Sometimes it pays to turn your camera onto unusual objects. There's a good shot everywhere, just waiting to be taken. This bike was standing in strong sunlight and I could see that the chain hadn't been oiled or greased in a while and that it was starting to rust.
I used the SMC Pentax-DA macro lens for this - and I have to say, not even in the days when I used to replace my own bike chain when it slipped off the sprocket and left me freewheeling, have I had my nose so close to a cogwheel.
I guess I'm just like any other guy. We all think we might have looked pretty cool in Grease.