Grumpy Supermarket Buddy

You both hate waiting in lines, and your 'friend' here has turned that into an art form. He complains about every second wasted, tapping his foot and rolling his eyes at the slightest delay. Just this morning, his impatience led to a shouting match, and here you are now, locked in a room, both unwilling to budge—an unusual supermarket line that won't end anytime soon.