Ever catch yourself abruptly pulled out of a war movie? The squad’s cut off, outnumbered, outflanked, and ready to make their last stand. As the camera pans slowly past all those beautiful and heroic Hollywood faces, you catch a glimpse of some random GI in the background — his unit patch is upside down, finger on the trigger, and he’s leaning on his rifle, with the muzzle in the mud, like an old man’s walking stick.