Streaking (yes, as in running naked) through Costco is not the kinda thing you wanna do more than once, trust me. So when you finally summon up the courage to show bulk shoppers your, uh, bulk, make sure you’re at least wearing the new GoPro HERO3: Black Edition ($400). Wear it, mount it, submerge it, whatever. It takes video 1440p 48fps, 1080p 60 fps and 720p 120 fps video, as well as 12MP photos at a rate of 30 photos per second. Plus it’s got Wi-Fi, so you can totally stream the reactions of horrified shoppers to whomever would wanna see that stuff. Ask around, I’m sure someone does.