This happens when you try to eat food, fire a bow, or anything else that you hold at that point for. You can also let go of the screen and it continues to break whatever is in reach of the pointer near the position it is in. The only way to stop it is to point at something far enough away that you can't reach it. This happens often, making it difficult to move around and do things throughout the game as you have to keep looking at the sky to stop from destroying your house and all your chests and such.