Tin Pot
Guru
Going up the escalators yesterday and the 'keep moving' left side got blocked by three large, drunk, bruiser-looking foreigners a couple of people ahead of me who presumably didn't know how it works, or just didn't care. The top of the escalator was only maybe ten or fifteen seconds away, so we just sort of grumbled and waited, but a guy two back from me was having none of it: "Keep moving!" he shouted, and when this didn't immediately produce results, he all but screamed "KEEP MOVING!" I turned back and barely had time to say "It's three large, drunk blokes" before we were at the top. The guy had been held up for maybe 15 seconds, and it had made him almost apoplectic with rage. Why can't people just tut and grumble like Brits are supposed to do? All this fury really can't be good for the blood pressure.
Sudden, overwhelming and unexpected aggression is far more effective. That's why.