How did you react to the laser double-slit experiment?

For those who don’t know, the double slit experiment demonstrates the wave/particle properties of light.

Here is an easy primer on it on youtube (a bit childish, but really clear):
http://www.youtube.com/watch?v=wEzRdZGYNvA

Here’s a longer but more precise intro:
http://www4.ncsu.edu/unity/lockers/users/f/felder/public/kenny/papers/quantum.html

I just read a book that made a good argument that this could not be explained well, without accepting that the photon exists in multiple universes simultaneously, according to the author proving that we are living in a multiverse.

Apart from being an awesome experiment, showing that there are lots of things in nature which are still unknown, that the easiest and most sensible explanation includes “proof” that multiple universes really exist really blew my mind.

What’s your take on the double-slit experiment? How do you interpret the results? Can it be (sensibly and logically) understood without multiple universes? Did the experiment change your view of the scientific reality?

Oh and spare me religious answers and double entendres ;)