Seeing this, I can't help but be reminded of http://web.mit.edu/2.009/www/experiments/steamCannon/ArchimedesSteamCannon.html
Apparently, this kind of weapon is a little more realistic than we probably thought. Go to Comment
Except, it doesn't have to be. Nighttime can be a relaxing, peaceful time in the world, when nature rests and soft shadows cover the ground. Not every night has to be filled with vampires, ghosts, beasts, and things jumping out from dark places.