I have a really strong memory of deliberately leaning over the edge of a bridge on the Manchester to Sheffield railway line just as a steam train was passing underneath and getting a face full of smoke and steam. If I'm half awake and think about it, I can still taste the smoke and smell the coals, and hear my mother telling me not to be so silly. I must have been 4 or 5 at the time. Although I'm technically old enough to have done this it has to be a fake, but very persistent and real, memory.