When it gets really close to the moment where you think they will confiscate the horn or charge an extra £300 for its own seat, I find yogic breathing or a small bottle of Underberg really helps!
Still not convinced? Here's what Underberg say...
"Underberg on your travels
Since the invention of the single-portion bottle, Underberg has been an ideal size to take with you, for uncomplicated pleasure while you are on the move."
There you go...!