Don't you hate it when you get on the bus in the morning to get to work, and find the vehicle is about two thirds full of loud and obnoxious teenagers? It could have beeen a peaceful, brains-off journey - a chance to catch up on your sleep, perhap. But instead you are forced to suffer inane chatter at top-volume, in surround-sound.
I found myself on such a bus and sitting next to an under-showered teenage boy, though to be fair he wasn't contributing to the general noise pollution. But I couldn't wait for the herd of kids to evacuate at their high school bus stop.
And when they did, my seat-mate stood up, swung his immense back pack over one shoulder and silently waited for me to get out of his way.
Still seated, I smiled at him and asked "And what do you say?".
He was good-natured enough to throw me a big sheepish grin and say "Excuse me".