At first glance, it looks eerily similar to Inspector Gadget’s Propeller Cap, except it’s a backpack. [Samm Sheperd] built a Propeller Backpack (video, embedded after the break) which started ...

“It’s the most popular propeller beanie hat ever,” Markley said. “We’re already well into developing a matching diamond sequined vest to go along with the propellers that serves as a jet ...