Algodoo

I built this explosion because I couldn't figure out how other people caused circles to appear out of nowhere when something collided with something else. It's the closest I can come to simulating a real explosion in that when the trigger is pushed (the "x" button), a catalyst (the golden ball with extreme density) is propelled (in this case by gravity) into a mass of tightly packed molecules (the bunch of green balls with extreme restitution) which are then excited to the point of rapid expansion. The white balls you see are killers and are necessary for the whole thing to work, as you will soon see. Would love to hear some feedback! Thanks!