This is a great example of why Emacs (and the lisp machine idea in general) is so amazing. Though as a demonstration of the power of emacs it's understated; I t

This is a great example of why Emacs (and the lisp machine idea in general) is so amazing. Though as a demonstration of the power of emacs it's understated; I thought this was going to require some advice or dynamic rebinding. Now if only I could do this for WhatsApp...