@meetmargin: What the guard actually sees when you raise your hands You hold still for two seconds with your arms up and walk out, and most people never find out what the person at the screen was looking at the whole time. It also explains the random pat-downs. The machine is not just hunting for metal, it flags anything that does not bounce back like skin. Ever been patted down for no reason? #airportsecurity #tsa #bodyscanner #howitworks #travelhacks