What's behind my eyes?

Lots of things. Some of them even make sense.

If a tree falls in the forrest, and no one is there to hear it, does it make a sound? It depends upon how you define sound

If sound is the physical phenomenon of pressure waves, then yes. If it is not considered sound until it is perceived, then no. From there one might then wonder if anything even exists if it is not perceived.

One might also wonder why someone would think that ctrl-s should end an editing session. The usual behaviour is to save and continue. Ah well. Life tends to be good at being annoying.