Now, we're know what you're thinking - it's already pretty easy to detect 'motion' in pants isn't it? Nevertheless, Virginia Polytechnic Institute and State University in Blacksburg has developed a pair of pants "that detect movement and let a computer know your every move."
These smart pants work via a loom that helps sew the wires and fabric together. Sensors embedded in the fabric measure the speed, rotation and flexibility of the pants with every movement. Wireless signals are sent from the pants to a computer to display the activity. The scientists at Virginia Polytechnic don't yet know why this activity would be useful (to a computer), but we're sure that use cases will arise.