This is a premade particle explosion with 3 different particle objects for Maya. The neat thing about this is that its explosion frame can easily be changed by simply changing the "ExplosionFrame" attribute to any frame number. The explosion will then begin to explode on that exact frame and you can begin rendering! With virtually no set up time, this explosion can easily spruce up almost any action scene.
Check out the preview video to see it in action.

This explosion was built for air, and the particle emitters are set to "Omni." For a similar explosion that was built specifically for land please check the suggested products.