Hey, I was having some fun with the Sandbox 2 Editor (which makes and edits maps for Crysis) and it's pretty sweet. You can do pretty much anything in it. Anyway, here's some pictures that I took:
This is what happens when you stack tons of boxes in one location.
This is just dozens of exploding barrels exploding, nothing out of the ordinary...
You can spawn as much tornadoes as you want!
Of course you'll need a pretty good computer to handle all of this in Very High settings in DX10, like me

. Here's a pretty sick
video It's really cool, check it out.