The phrase blue falcon is traditionally used in the military as a stand-in for “buddy fucker” — like, say, the underage private who gets a DUI on the way back from the strip club, then dimes out his comrades for buying him beers. There’s (at least) one in every unit, and he will always find you, and screw you over. Living with blue falcons is a well-worn part of military life.
Benjamin Franklin nailed it when he said, "Fatigue is the best pillow." True story, Benny. There's nothing like pushing your body so far past exhaustion that you'd willingly, even longingly, take a nap on a concrete slab.