I am new to the program only got about 10 hours or so on it, it's pretty cool, and I thought id suggest a cool idea I had. I love when you explode planets, I have a fast computer so I can have up too 150 peice's which makes it look so awesome, but I was thinking, wouldn't it be cool if you could set for a object to explode when another object collided with it? I don't think there is a way to do this, how I think it "could" work, is you select the object you want to explode let's just say earth, and when you go to the explosion screen you could have an extra option like "delay" or maybe like explode with impact. So when an impact hits the object, in this case earth, the planet will explode apon impact. Of course the planet isn't gonna explode to peices if a small object collided with it, perhaps the mass of the object and the speed would somehow play into affect, maybe it would be a cool addon in the future just thought id share my little idea