There is also another underlying thing in there.
When someone thinks they see something or thinks
something has happened to them and they explain
this to someone else and that person hears it over and over
they begin to see it too and pass it on until everyone is
starting to see and believe in something that is not there.
Its a mind trick, you hear something so much you begin to see it.
And with all the mental illnesses in the show, it
added to it lol.
Love PA and i wish it was still airing on adult swim.