You can “ride” an ice all the way in, it’s a super inside job in some cases. Even if the outside ice is a big barrier, if you have to break it, paying an additional 2 for each other ice is possibly going to save you some money. In the case of curtain wall, it makes the eventual break less expensive. I don’t know why you would ever pull ice the other direction… but you can? Maybe if someone plays a chum outside a barrier you’d move the barrier to the outside to not worry about the chum anymore, stuff like that?
I like it because it breaks the rules. And I want to play it with paintbrush. 
Redirect: Untested/Non-competitive Decklist MegaThread - #453 by gumOnShoe