Best example I saw of the F-111 Mud Movers was a live firing demo at Holsworthy in the 70s, with a pair of Aardvarks dropping HE onto the side of a hill some distance away. The roar of the machinery coming from right rear, the multiple flashes on the ground, followed quickly by that gut-shaking KRRUMPP was a real hoot.
Then the RAAF Hueys fired mini guns and HE rockets, and then the army ruined the show by firing the gun on a tank, it ricocheted and landed in some trees many km away and started a bushfire. The show stopped while the boys headed off to put out the fire.
