It's time to blow some stuff up with this tutorial by Jonathan Lampel. Just a warning: it's almost 1.5 hours long..
Ever since I started making dynamics tutorials, people have been asking me how to create an explosion. I did a lot of testing and a bit of research, and I was able to find a way to make nice looking explosions in Blender.
While it is not 100% perfect, I hope that this tutorial can point you in the right direction and show you the necessary steps for making a great explosion. I would love to see your results!