Lava

There is something beautiful and scary about lava. In this video from National Geographic, this shows very nicely. That is supposed to be stone, and it flows like water and glows like stars... it even bubbles... Seems to me like the drink of gods deadly for mortals. The funny thing is, you can be quite close if the flow is tranquil, I've heard you can even step into half cooled lava if you are fast enough (and don't ware rubber shoes), but if it's mad (it is so if it comes with gas), you'd better not be around... astonishing thing, anyway, some day I'd like a closer look...