It's excellent. I downloaded that last year and have watched it a few times since. A simple explanation of an experiment that shows how strange the universe actually is. It's been voted 'the best experiment of all time'! Despite the fact that it must surely have been repeated thousands of times since Young's original experiment 200 yrs ago - and the phenomenon of superposition has been employed in simple qubit computations - it seems that there are still many non-scientific people who reject the whole idea. Can't blame them really, I suppose. This kind of thing could give reality a bad name grin

"Time is what prevents everything from happening at once" - John Wheeler