Wait Till Your Mum Sees The State Of Your Shirt
Riding in the rain? With a white shirt on? And no mudguards?
How dare you turn up to work with that streak of black road-grime up your back - go home and get changed at once!
Oh, and a huge thank you to Yokota Fritz at Cyclicio.us for the pointer on this one - I challenge you to limit yourself to watching it only once!