Beau drags his feet onto the plane and trips off it.  He shoulders the duffle bag that Charlie lets him carry and, lilting a little sideways, stumbles on the exit's threshold, bumping into the person coming the other way.  He makes his apologies, and the other guy seems like he might be about to get weirdly aggressive before his eyes flick up over Beau's shoulder, at something past him -

- holy crow, that's - a heck of a lot stranger than whatever was about to go down here.  It takes Beau half a second to start moving, to start running - a moment of indecision caused by picking a direction, but really there's only one option, even though it puts him somewhat closer to the beast - he bolts the rest of the way out the door and makes it a good six paces or so away from Charlie before he eats pavement.  And before he can pick himself up, the mirror is already crashing down onto him.