Or is, just possibly, an airhead.

A few years ago I was on a DL SEA-CVG 757 with my 5-year-old son. We were back in the last row of Y. As we taxied onto the active runway, an aisle-seat passenger ten or fifteen rows ahead of us unbuckled, got up, walked to the back galley, and tried to start a friendly chat with the two FAs in their jumpseats: "Hey, I got a lot of friends who are flight attendants!... "

He was drowned out by the engines spooling up as we began our takeoff roll. Both FAs began screaming at him: "Lie down! Lie DOWN NOW! Lie down on the f***in' FLOOR NOW!" After a few seconds the guy complied, and when we got above 5000 or so he was frog-marched back to his seat. Later he said he'd just "spaced."

We share the skies with morons.