Here's how it goes - you're wearing Daffy Duck socks, so you forego the rolling up of suit pant that normally exposes such a beautifully defined calf. Instead you throw caution to the wind. An unpropitious gust immediately blows that fine fabric back between the teeth of the cog and the grip of the chain. Putain de merde!
BONUS TIP: The size of the tear that results is a fair power meter. If the rent proceeds to the thigh, you may well be Cadel Evans. Thanks for reading, Cadel.