I posted this reply before this thread was even started. Took a while to show up here though, quantum anomolies and all..
You have to love Zero's theory. Take your pencil and drop it on the table. Now, remember that clunk and look at the pencil on the table - that, did not just occur.
The theory is that for it to fall, it has to fall half way and to fall it goes half way again and again never reaching the other surface.
Have fun with that one.