Gadget Freak John Tindall uses his cannon to demonstrate the noise level of a sonic boom. In this clip from a History Channel UFO Hunters episode, Tindall uses his cannon to replicate a sonic boom. On the third try, the massive sound actually blows the cannon apart.
This gadget freak review highlights some new mobile technologies. Google's Project Tango is building 3D models of the space around you, and the Loop is a virtual wallet that allows you to pay merchants by transmitting your card data.
This Gadget Freak review looks at a simple device for sealing gunshot wounds, an open-source construction set that uses straws and cardboard to build shapes and objects, and a hidden electronic safe built into a wall.