This was so amazing I actually had to start up an interpreter and write my own implementation. This was extremely fun and it blew my mind. It's one of those obvious things that's only obvious after you see it. Others are calling for you to write more of these and I definetly feel the same.

If I could se a new one of these every week and play along in the terminal I'd have a a lot of fun (all in the name of learning to!).