Video: Man builds beautiful machine to throw knives with incredible laser-guided accuracy

Quint BUILDs created this exquisitely-engineered machine to throws knives with laser-guided accuracy. He explains that knife-throwing "in theory is simple. Match the knife's rotation to the distance so the tip hits the target. But in practice, it's hard."

"Cutting-edge technology should do this easily, if we can keep it from destroying itself," he says.