Of bicycles, and ice...

"Get a bicycle. You will not regret it, if you live."
—-Mark Twain, Taming the Bicycle, May 10, 1884

"Every time I tried to steal a look at a pretty girl, or any other kind of scenery, that single moment of inattention gave the bicycle the chance it had been waiting for, and I went over the front of it and struck the ground on my head or my back before I had time to realise that something was happening."
--Mark Twain, Chapters from my Autobiography, Chapter 20

I don't even have Twain's excuse: pretty girls and scenery are in short supply in the dark, at midnight, on my ride home.