The 3rd Space haptic vest for video-game players uses eight embedded pneumatic cells to suggest the sensation of a finger tap, G-forces, or even a bullet’s impact. The vest is based on a more complicated medical device designed by vascular surgeon Mark Ombrellaro, TN Games’ CEO, which lets doctors examine patients by touch from a distance. The blows the vest delivers are painless, but Ombrellaro says some gamers have asked that they be intensified.