you'll fall by my hand

It's fairly common to encounter a delay on the subway, either going to or coming home from work. Medical emergencies, power outages, and most recently, a train derailing are but some of the reasons for these delightful occurrences. During one such delay a woman asked in a very loud voice "am I driving the train?" There was an instant lull in the irritable chatter followed by an almost audible collective thought 'are we stopped because there's no driver?'
The woman asked again, with more uncertainty and a hint of fear, "Am I supposed to be driving the train right now?" This time people had a chance to locate her face amongst the crowd. She was clearly not employed the transit commission and wore an expression of someone who was immensely confused. "God I hope not," came the collective thought.
She then started laughing a little. Not the laugh of a sane person, or even the insane laugh of a villain bent on world domination/destruction. It was a laugh of relief. She didn't really want to drive the train and when she figured out that she didn't have to her tension was relieved by laughter.
Unsurprisingly, no one else joined in in this merry discovery.