In some parts of the game when you use your electric fighting prod and put it away to use a gun, the game will think you still have it out. When you leave the spot you are standing in, the electric ball at the end of the prod will float in the air. It will stay there until you leave that room.

When you get to use a turret gun in certain parts of a level, press L3 to zoom in 3x. This will help you see what you are shooting at, and result in better aim.