Most of the time, getting on a plane won’t do much for you at all; in fact, these days the only thing you’ll get out of it is a bad back, an expensive bill for trying to text someone from 35,000 feet up, and, if it’s Ryanair, a frighteningly close look at the inside of your window. But if you’re a movie star like Denzel Washington, it can do wonders. Back in the early 1990s, Washington was well on his way to becoming one of Hollywood’s leading …