Eighteen passengers on a Vietnam Airline flight from Hanoi to Paris were injured this morning when their plane encountered severe air turbulence, according to Agence France-Presse. The plane later landed safely at Charles de Gaulle airport in Paris, and none of the injuries were thought to be serious.

But here's the interesting part: according to the story, these passengers—excuse me while I crank up the old caps lock and put the italics in gear—WEREN'T WEARING SEAT BELTS.

What's wrong with these people? Are they same ones who insist on leaping from their seats as soon as the plane has landed? Do they equate seatbelts with having their liberty snatched from them? Do they not actually know how to use seat belts? Or are they simply, to use the proper medical terminology, idiots?

Here's the rule, once and for all: people who go hurtling through inner space at 600 mph at an altitude of 30,000 feet above the nearest chiropractor's office should always wear seat belts. And it's not because I care whether you bonk your noggin on the cabin ceiling. I'm just afraid that you'll land on me.

Smart Traveler Mark Orwoll is the International Editor of Travel + Leisure.