Fans of Batman will be familiar with the batarang, a bat-shaped throwing weapon that Mr. Wayne uses to subdue his foes. In the trailer for the new film Batman v Superman, he uses a variant that can be folded up when not in use. German cool-weapons-maker Patrick Priebe saw it, and decided to make one of his own.
At the heart of Priebe's fan-made batarang are two stainless steel wings/blades – although he tells us that if the thing isn't actually going to be hurled at anything, those could make of something cheaper such as aluminum.
UPGRADE TO NEW ATLAS PLUS
More than 1,500 New Atlas Plus subscribers directly support our journalism, and get access to our premium ad-free site and email newsletter. Join them for just US$19 a year.UPGRADE
A dual-spring mechanism joins the wings together at a pivot point in the middle, holding them both down. With the press of a button in that middle piece, however, the springs are released and the wings satisfyingly snap open.
As can be seen in the first video below, the thing really does work – particularly on melons. The second video provides more details on how the batarang was made.
Source: Laser Gadgets by Patrick Priebe