Submarines.
If you open the windows in a submarine, your problems will begin.
He's the one with a parachute on his back.
A. "Because sheep would be too obvious"
By the stripes on his Adidas jumpsuit.
Mom: It's a private caller. Dad: Don't answer that. We only pick up for ranks Lieutenant Caller and higher.
Nobody ever says "Thank you for your service" to the latter.