Everyone down, he's got Great Stuff

After my failed attempt to insulate around my backdoor, I thought that I might be able to fill in the hollow door to have it better insulate.  I went to Lowes to ask if they had a door filler of some sort that I could use.
Associate: None that I can think of.
Me: What about Great Stuff?
Associate: The problem is that it expands in all directions and the door would break as it expanded.
Me: What if I did it in layers and let it set in between?
Associate: You’re still putting the stuff in, the door would break no matter how much you put in.

Who knew that plastique and Great Stuff could both be used to blow doors off their hinges?