Well, it was about time someone did it. Brendan Walker, from the Royal College of Art, recently designed and built a body-mounted machine that detects thrill levels and takes a snapshot of your face during peak moments. The project stems from ongoing collaborative with MIT to create a Thrill Measuring Device that could be used to tailor video games and amusement park rides that react directly to personal psychological information, and the device works by detecting the Galvanic Skin Response, or GSR levels from the skin at the user's fingertips. When they reach a certain level, the camera is activated. A series of photographs of people, uh, enjoying the machine is on view at the M + R Gallery in London from February 19th to the 27th.