The piston propels air down 40-foot tubes at 900 miles per hour, mimicking a shock wave from an IED. The blast impacts live pigs, human cadavers and dummy heads. Sensor readings from the dummy heads quantify movement and the strength of the event's pressure waves. Students examine the neurons in the animal and human models to see how they reacted during the blast. And students analyze video of the test, taken at 500,000 frames per second.