On windy days Boomer may throw balls long or into the net. There is a wind adjustment to minimize this from happening. If the wind is strong AND changing directions, it may be impossible to guarantee good ball throwing. This is the same with all ball machines. Also if some balls are dead or worn down they may land in the net or long because the wheels can’t get enough topspin on them to keep them in the court at high speeds. This is a problem common to all ball machines. The problem can be eliminated removing the dead or worn balls.