spider sense

Victor Mateevitsi, a computer science student at the University of Illinois—Chicago, has developed a suit that gives you a "spider-sense." The core of the suit is a robot arm connected to a microphone module. Each module projects and receives ultrasonics, making it more like a bat-sense than anything else. If the module detects someone approaching, the robot arm places pressure on you to let you know what direction the "threat" is coming from.

And don't forget the extra bacon