Rain. Often this means my wife gives me a hard time about riding, but since her car wouldn't start, no hassles (must remember to re-attach her battery cables before she gets home).

Soaking wet on the ride but happy. Then I hear this weird noise from the rear tire. It's the sound of the frikking nail I just rode over (never saw it, of course) hitting the ground on each rotation of the wheel. Damn.

First the humiliation of walking the bike along a busy road to a shelter. Then trying to change out the tube with shaking hands because I'm so cold. Water running down into my shoes.

But--and I know I don't need to tell any of you this--it's still better than driving.