Excuse Me While I Puke...

clipped from blog.wired.com The LED Incapacitator uses a range-finder to measure the distance to a target's eyes, Threat Level notes.  Then it unleashes continually changing, multi-color light pulses that make the target feel bad -- really bad.  The "effects, whose effectiveness depends on the person, range from disorientation to vertigo to nausea," according to Technology Review.  Harder to beat would be a radio-frequency puke ray.  Lucky for us, the Navy is backing one of those, too.