Even when people are climbing up the escalator, I've noticed something strange: there is an almost universal tendency for people to stop moving as they near the top. It's like once the next level is in sight, their legs stop and they relax for the last part of their journey. Why stop then? It should be the easiest part of the climb, the one with the most gain per calorie expended, but they just stop moving. During crowded times, this causes a chain reaction, because the person behind them now has to stop even earlier than they normally would, and so on down the chain, and sometimes a long escalator out of a subway loaded with would-be climbers on the left stops moving completely because one person stopped climbing shortly before the end. The world would be a more productive place if we'd all just follow one simple principle: "Everybody get out of my way." Wait, no, I meant this: "Keep moving. Endure to the end." There, that sounds better.
There's a saying from Confucius on this point: "Though in making a mound I should stop when one basketful of earth would complete it, the fact remains that I have stopped. On the other hand, if in leveling land I advance my work by one basketful at a time, the fact remains that I am advancing." May we all keep advancing, and go easy on the gadgets.