What you don't want to hear first thing when jumping into a pre-booked taxi, at 04.30 to go to Heathrow airport...
65 year old driver - "Do you sleep when you have to wake up this early? I got home from a dinner party at 2am and decided I might as well stay awake to drive you to the airport."
Nervous me - "How long have you been awake then?"
Driver - "Oh, didn't sleep to well the night before either, but don't worry, I'll sleep like a baby when I get home."
Damn these early morning flights.