User blog comment:FairyRaven/Fairy Tail Chapter 325: Unity, Review and Commentary/@comment-5983489-20130330051400/@comment-5840892-20130330063758

I know, that is the truly scary part of Quantaum Physics...

It mind-****s you quite well.

But as an example, say you shoot a beam of particles towards a barrier with two slits cut in it; if you observer it happening they appear to have gone through one or the other and the "splatter pattern" (you could call it that) on a wall behind the barrier would look like this:



They went through one or the other. But if you don't observe and look at the results only; you get this:



They went through both simultaneously, like a wave. Here's the mind-****: When observing they act like particles; but when not, they act like waves. That is Quantaum Physics at work.