Because nothing makes you feel better about a truly horrific scenario than the use of chirpy music and cute rhyming.
Yes, welcome to the all-singing, all-dancing, all-American safety video from Virgin America. Where the cabin crew say we're "gonna live it on up in the sky" (but will also say "Really?!?" if you don't know how to use a seatbelt), where the children are annoyingly precocious and where the terrifying prospect of an evacuation is made better by someone singing "In the unlikely event we need to get you outside/Your exit is equipped with an inflatable slide."
Click play above to watch it, possibly with your jaw slightly on the floor. This sort of thing would never wash with us Brits. And we have to say: we're rather proud of that fact.