Cyclist. "Why can't you look where you're going?"
Motorist. "How the dickens could I when I didn't know!"
Middle-aged Novice. "I'm just off for a tour in the country—'biking' all the way. It'll be four weeks before I'm back in my flat again."
Candid Friend. "Ah! Bet it won't be four hours before you're flat on your back again!"