MORAL: Don't be too casual with escalators; unlike stairs, they don't have landings every couple of metres! A fall will not only take down the careless or unlucky person who falls, but also everybody who is in his/her way until the very bottom -- this has resulted in major injuries and deaths around the world!
Some interesting links to watch others fall down:
1. Boy with crutches falls down, kidding around!
2. Drunk lad falls from 20ft (5m) off of escalator
3. Kid playing along escalator falls and saved by shopkeeper (Wait for the ad to be over!)