Sniper prank - illegal, don't try this bullshit at home.

Note: true sniper pointers are invisible infrared beams. Plus you have to calibrate them for bullet drop. (BTDT, it's no fun.)

But to the every day Hollywood movie watching public, a red laser dot = sniper warning.



Do this, and you will likely find yourself explaining things to the police on pain of being charged with instigating panic.