Great little animations you came up with there Philip! I had the same sort of idea occur to me when I saw Gog's picture,but you beat me to the draw-bridge(sorry). I have a question... when you drop your spheres on the terrain and then animate the terrain over the course of the ani, do the spheres follow automatically, or do you have to reposition the spheres and re-drop them for every key-frame? Am I making any sense here?