Aw the way of kids... That fertile imagination scary the bejasus out of us..lol
I recall as kids we used to run on the railways track..( yes..I know now


)
Anyway we would go so far but no further.
A nearby estate had been built, but the platform had been left behind a brick wall on it.
And to get to it, we had to walk along the track and then into a short tunnel.
A you can expect we scared ourselves silly with tales of ghosts monsters etc just getting into the tunnel.. So passion were high.
On other, at the far end sty what looked like a huge bird.. Really BIG..
It stopped us passing any further for a year or more, until we plucked up courage and got close enough to see it was a points signal of some sorts, 10 ft in the air. (mainline trains/some underground network).. And it had what looked like the wrapping of a large paper bag of potatoes caught up in it.. And everything that the wind threw up.. It looked like some evil scarecrow.
So one brave/stupid enough
we passed on into the underground network proper, where our activities came to a crashing end, as we got stopped and taken home by the police to some very vexed parents
So I gave your post a funny, as it reminded me of how kids think.. And brought back a few nice memories of old school friends.