How NOT to use a laser, as in the local news today:
Green Laser pointed at Police Helicopter.
I did the same thing before 30 years , with an common flashlight on an Army Helicopter , actually I was using the mors-code button, and so it was not an stable beam,
even so it did attract the attention of the pilot , and the distance was less than 100 meters, and he did came over the area that i was,
so to find out what was it..
I was hidden under one huge Excavator ..
There was an army air base near to my home, yes army helicopters .. ( they did lots of exercises and they was flying like 4 or 8 or more together ) I will never forget the sound of their engines , and that in our home, anything made from glass, it was dancing , when they was flying above our homes.
It moved away before 20 years, and so its just a memory .