That's actually pretty cool! When you say "Action" do you mean that there is action occurring in the shot and it was staged? Or was this just a lucky find that you stumbled upon in a multiplayer match? Also, wasn't there a weapon in the Reach MP beta that launched plasma grenades (albeit in a very different way)? Both weapons look to be overpowered!
That would be awesome if that was real in Halo, well of course if you mod a gametype you could do that.