English: Billiards: forcing hazards. The player can gradually place his own ball lower and lower down the table, as shown. Suppose, for instance, he places his own ball at B. There is still an easy losing hazard off the red into the top corner pocket, the only difference being that the stroke must be played harder. When the ball was placed at A, the losing hazard could be made by simply what is called dropping on to the ball. In fact, the stroke could be played so slowly, that the red ball, after striking the top cushion, would not rebound more than a foot down the table. As, however, the striker's ball is placed lower and lower down the table in the positions shown by the letters B and C, so the stroke must be played harder and harder. Another perfect half-ball stroke that can be played either slowly or fast, is shown by the two lines drawn from the spot S to the two top pockets. Suppose a ball to be placed in the centre of either top pocket, or a few inches along the line drawn from the pocket to the spot. Then it is a simple half-ball stroke to go in off the red into the other top pocket.