Oh sure, there's a multitude of head-mounted cameras out there for devout lifebloggers to snap up and wear, but we're guessing the world looks a bit different when you're scaring everyone off while waltzing down the street. Granted, the Momenta necklace isn't a whole lot more attractive, but at least it's a touch less noticeable. This concept would reportedly capture anything and everything that happened in front of the wearer, and when it detects a sudden jump in heart rate, it'll log everything that happened five minutes prior and continue rolling until you tell it to halt. Kind of freaky, sure, but capturing the faces of folks who see you wearing this thing for the first time would un ...