If you remember the forest fires in Fla. several years ago, the A$$ H01e that started those fires used marine flares. I would not set one off from my back yard, you could start a forest fire, or the next Chicago fire. I shoot them off on the 4th with everyone else. Only one though and I let some one who hasn't ever fired a flare do it so they have done it. They're no big deal. Very low recoil. You can get white flares and practice with one of them, then keep the other 2 for emegencies, like when a ship is going to run you over. I keep my expired flares with my new ones. 3 just doesn't seem like enough. Firing the oldest one on the 4th of July.