So, I've got a grappling hook and thick paracord, but throwing it up in the air relentlessly has become tiresome, Ninjas must have gotten bored with this crap too I assume. Fortunately this dude had a great (yet seemingly dangerous) idea to craft his own Grappling Hook Launcher....awesomesauce.
http://www.instructables.com/id/Grappling-Hook-Launcher/
I shall return with another post with the results of my endeavors, hopefully propped up on some super cool building in Kyoto.