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Pretty sticky exhaust!
I don't think they have all the bugs worked out yet.That was new to me, too. Some people have more time than sense (and more money, too).
First thought: these two "geniuses'" have two much time on their hands. After I ruminated for a few minutes, I wish I had them when I struggled through Physics 101/102, my life would have turned out sooooo much different. Not one word was spoken but they spoke VOLUMES! Not only can they explain the complex but they do it with panache.