The flight-suit for an F-16 contains air-filled bladders.

During high-G manoeuvers, these bladders inflate, crushing against the thighs, forcing the blood back up into the body to keep the pilot (or passenger) from passing out.

Chances are, the F-16, in a lazy, sweeping turn, can still generate enough G-force to drop an unprepared politician in a heartbeat . . .

S-3 Vikings generate almost no G-force, certainly nothing on par with the Viper. Whether it was the flame-retardant properties of the suit that were the benefits, I don't know. But wearing a flight-suit in an F-16 and in an S-3 Viking are very different concerns . . .

I'll bet the President would have been just fine in a suit. Helicopters can crash and burn, too, but I've never seen a President in a nomex suit on the Presidential helo . . .