An explosion of debris driven by maya nparticles. This could be used for debris exploding out of a volcano or the emitter could be rotated another 90 degrees and it could then be used as gun shot debris explosions. The scene has a little expression enabling multiple instances of rock debris to be emitted. The emitter is key frames to emit just a few rocks and the gravity is animated to throw them out at speed. All of these functions and attributes can be tweaked. I am happy to help if required for advice or troubleshooting.