how to make an explosion , it's pretty cool .

Hey Steve, I came across this build recently too. It looks awesome. This is something I wanted to try with my Wisconsin build. I doubt it would look as good as this person's.

Impressive!  Bjorn Jacobsen has written a couple books on this and his work is impressive as well.

Here's a more direct link to the video:

Capn-- very good. It shows how the did it. Great tutorial.