Yes, Jörg Sprave, who runs The Slingshot Channel over at YouTube, constructed this massive, six-foot long slingshot designed to launch giant machetes.
While some are criticizing this cool contraption as dangerous and impractical, others are praising it as the weapon of choice in the event of an inevitable Zombie Apocalypse. Since it probably doesn’t have any real use, zombie decapitation is most likely all it’s good for.
Although I don’t recommend you create one of these weapons for obvious reasons (i.e. machete in the face), it is surprisingly easy to build. All Sprave did was construct a sort of wooden crossbow/rifle about six-feet long, and on one end put two reinforced points to hold the band. On the other end, he put a notch for the machete to rest and a lever to lift it up over the notch. He used an old crossbow rubber band and placed it on an incision he made in the blade to propel the machete.