So as a passenger in the back - if we're taxing to the runway and the flaps aren't extended - do I notify the F/A?
There's that bit of hesitation that everything is normal and you're just a passenger - so what do you know?
But after spending a lot of time on planes and usually sitting in the exit row, if not upfront, I tend to make a note of the flap/slat extension after-start and provide an extra verification before my flight takes off
