Pass Air?

I'm renting a Hyundai Elantra while I'm in Las Vegas, and just yesterday, I noticed something on the dashboard.

There is an indicator light that notifies you when the passenger side's protective air bag is ready to balloon-explode out should there be an accident.

Well ... the one on my car is inoperative. But that's not what piqued my interest. See what it says? It's telling me that I can't fart into a bag. "Pass air bag off." It doesn't want me to pass air.

I've heard it called "gas," even "wind." But never "air"! Funny, huh? I kid you not.