.. and contain rocks ..
.. if we're into anecdotes, my first foray into cloud territory was as a young chap doing his CPL training.
Had an ADF, you see ... not much idea of how to use it, mind you, but had one, nonetheless. On top .. 8/8 ... turned the ADF volume down as it was annoying ...
Some time later, after the ADF turning point ETA was well passed .. started to get uncomfortable, checked the volume ... had turned the unit off, hadn't I ? Idiot !
As I said earlier, a tad know-it-all slow learner in my youth. Eventually, between a few frights and a few belts around the ears from more experienced chaps, I settled down and started to do things the way one should if one is to achieve old bones.