Columbia Pictures So, these three prima donna actors think they're just shooting an action movie, but in fact, they've landed themselves balls-deep in a real-life disaster. Sound like the plot of Tropic Thunder ? Fair enough. But before Stiller, Black, and Downey Jr. donned camo and ammo belts, Short, Martin, and Chase sported Mariachi outfits for John Landis's ¡Three Amigos! in ...