Not cabin crew, I know, but:
I was flying a BO105 helicopter, and landed on public land to let the pax conduct some business. I stayed with the aircrat, and a couple of men of a certain age came passing by, and stopped for a chat. One of them asked me what the tail rotor was for, so I described the system to him as best I could. I should mention that this particular tail rotor is two bladed, and is basically a plank four of five feet in length.
I would never claim to be the best teacher in the world, but I thought I'd given a fair and simple enough description of the tail rotor. I was just a bit flummoxed when the second man then said, "It seems to me that the wheel at the back is fixed on sideways. How does it manage to push you along?"