You wanted it, so Zack built it. It's the A.S.H.P.D. (Aperture Science Handheld Portal Device), the gun for the popular videogame Portal and Portal 2! And the best part is Zack shows you how to do it for about ! Tune in tomorrow for the test film! Indy Mogul's Backyard FX features cheap, DIY filmmaking tips and tutorials including special effects, props, and camera equipment.