Many moons ago a friend was cc for a 757 operator, with a rear facing crew seat just behind the trailing edge. It was a regular thing that on engine start-up a PAX would get more than a little nervous (the RB211 can spit out a lot of black s
t on start-up), and states "errr, a errrm, the engines on FIRE!!!!!"
My friend would look out in all seriousness and calmy state "I think your'e right .... and I'm glad it is ........... (impregnated pause) ........... because if it wasn't we wouldn't be going anywhere"