I remember one late night flight I took from San Antonio, Texas to San Francisco via LA. More than half of the passengers on that Southwest airline flight were asleep.
As soon as the plane landed, the flight attendant announced: "Ladies and Gentlemen, Welcome to Mexico! Viva Mexico!"
What a way to wake up the passengers!

(Incidentally that was in 1998 - 10 years ago! Southwest still had a brown and red orange color. I think they are now blue)