Wycliffe writes: Most cops are not out to kill someone, but when someone reaches for a cellphone or their glovebox, the cop may assumes the worst and try to protect themselves from dying. Guns are used to immobilize the target, and aren't even that good at it when a person is charging. What other potential devices could be used to protect a cop so that guns are unnecessary? Foam? Lightweight body armor? Nets? Robots? 'M.A.N.T.I.S.' paralyzing gas? Force field? What non-lethal technology out there has the best potential to be more effective at immobilizing a target and/or protecting a cop than a gun?