Well, I was about to post a reply in one of these asking why everyone was making a big deal about Plutonium. I mean, it's just one in a list of elements...well, Sandy answered that. Think of it like having a lotto ticket, from a gambler's perspective. Of course you know that the MOST LIKELY thing is to get a little loss, break even, or make a small buck. But the whole time you're in suspense wondering if this is THE ONE, the big score. Judging from the brothers' personalities, it's a bit of that, a bit of chatter to pass the time while they work, and a bit of pulling the other's leg. Any number of reasons spring to mind.