QUOTE(Falkoner)
Okay, I got the rock sprite thing but now I don't got it... I tried doing the second way, but lil-shorty didn't clarify, is it multiple triggers? one trigger? Can someone please list the triggers needed, and, if it isn't too much, can someone post an image on what the rock looks like.
In order for the missile-turret/junk-yard method to work you need to wait for the ai script to actually take effect. This could be a simple as adding a small wait before you remove the turret.
The rock sprite looks like this:
Note that the sprite was not created on top of the tank (which is where the turret was)
When you create a sprite it will be higher up from where the unit was.