I have found this new technique to get stack your ice cream as high as possible when using the ice-cream machine.
So the first step is to slowly fill up the inside of the cone and make sure that the ice cream fills the entire thing so it can't collapse...you need a strong base (its simple physics)...anyways.
The next step is to slowly move the ice cream cone back and forth as you let the ice cream come out, and just do it as high as you want(or until it falls if you want to see how high you can get it).