the double slit experiment

I like that quote from the last video:

Atoms are not things, they are only tendencies. So, instead of thinking of things, you have to think of possibility. They are all possibilities of consciousness...

and I follow the stream initiated by Jacopo with my favourite quantum enigma: the double slit experiment.
I never found it so well explained... maybe dr quantum isn't so bad! but I promise: we wont have a "Q" t-shirt waiting for you in rome  !