http://www.bbc.co.uk/newsbeat/10646540 "The discomfort causes whoever it's pointed at to immediately start moving away." Perhaps its nickname will be the Heatvuzela. It's been around for a few years: http://news.bbc.co.uk/2/hi/americas/6297149.stm
Laser in action: [ame="http://www.youtube.com/watch?v=rTpP412fM8U&feature=popt00us04"]YouTube- U.S. Navy Laser Weapon Shoots Down Drone in Test.[/ame]
Those (heat ray for riot control and laser for... not riot control) are completely different things, I assume?
[ame="http://www.youtube.com/watch?v=_TuG9YSyRhU"]YouTube- Bop Gun (Endangered Species) - Parliament[/ame]