A test of our observational skills showed that people either saw 14 or 15 passes of the basketball.*
Now, go watch Michael Shermer give the test here.
Also, check out what Mark Liberman has to say about it.
I think this demo is a decent metaphor for the origins debate. What if life, and thus evolution, was designed? Would it be more like a man in a gorilla suit walking between a bunch of basketball players than it was an elephant sitting in the room? I’ll expand on this next.
*I held up the comments of those who saw the gorilla, but there are now posted.