laser pointer

Ssistant Chief Constable Alun Thomas, from British Transport Police, told Sky News: "Deliberately shining a high end blue laser pen or pointer at a train, particularly if a driver is targeted, is extremely dangerous.It is not illegal to buy a laser pen and they are easy to get hold of, often used in business presentations, in industry to show specific distances, by people in nightclubs and the military to mark targets at night.It is currently an offence to shine lasers at pilots, with offenders facing fines of up to £2,500, but investigators must prove a person endangered the aircraft. http://www.kitlaser.com/blue-laser-pointers.html

http://www.nicovideo.jp/watch/sm31625883