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And, oh just before I move on from that one too, should anyone, if you're swimming and you find you have a leech on you, when I was a kid, I spent time at my grandparents' college and one year I was getting out of the water and coming from shore and it felt like there was a little bit of grass or seaweed on my back line and there was a couple of leeches hanging on there. The best way to get them off is by, some people say smoke, alcohol, like a cigarette, I don't think, but alcohol or salt, no. The best way to do it is pull the skin really tight where the leech is attached, take maybe your nail or something thin and slide it under the leech's mouth to get it off. If you do it the other way, yes, you'll get the leech off but you also risk having it regurgitate, vomit, into the wound and it will be introducing a lot of bacteria and things so that's the best way to get them off. Just don't try and pull it, don't try and pull it, it's the same thing will happen, it's just regurgitate. The next one here, number three, if our sun collapsed into a black hole, what would be its diameter? So I'll give you a couple of choices, a few choices here. Three meters, three kilometers, 30 kilometers or 300 kilometers. So if our sun were to collapse into a black hole, but if you could squinch it down into a black hole, what would its diameter be? Three meters, three kilometers, 30 kilometers or 300 kilometers?