Trebuchet is a type of a catapult. Joerg Sprave has made a handheld trebuchet that has the capability of firing circular saw blades hundreds of feet. Even though it does not have much of a purpose, it sure looks like fun. Accuracy is not the strong point of the contraption but it was still able to take down a mannequin half a football field away.
You can check it out in the video below: