I have seen this some time ago when it was mentioned on slashdot. By now there should be lots of nice videos illustrating those on YouTube. One is this.
What I really like about this is that it allows to gain conflict-free intuitions about QM via macroscopic processes.
See also De Broglie–Bohm theory. I do not see a clear reason why MWI must be preferred. For me the deciding point is which can (better) be generalized relativistically. Apparently there are bohmian mechanic-based approaches
ADDED: The latter article contains the interesting conclusion: "if Bohmian mechanics indeed cannot be made relativistic, it seems likely that quantum mechanics can’t either".
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
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