I hate it when my inner 15-year-old comes screaming to the fore of my brain. That’s just what happened when I discovered the new Look Lock from Photojojo. The look lock is an articulated arm that mounts to your DSLR’s hot shoe on one end, and holds your iPhone securely at the other. And why would I want my iPhone stuck to the roof of my camera? For any number of reasons. You could make a video of your shoot by turning the phone into a video camera mated to your DSLR, or you could use it as a mirror to show an image to your subject, or you could even use it as a teleprompter when using your camera to record on-camera speakers. It’s a simple little device that, against all odds, sure seems like it might be really useful.