In a variety of the game called three-cushion billiards, the cue ball must also touch a cushion or cushions three or more times to complete a carom. Chalk in small cubes is applied uniformly to the cue tip permitting the players to strike the cue ball off centre on purpose in order to impart a spinning motion, called "side" in Great Britain and "English" in the United States. There are three ways of scoring: (1) the losing hazard, or loser, is a stroke in which the striker’s cue ball is pocketed after contact with another ball; (2) the winning hazard, or pot, is a stroke in which a ball other than the striker’s cue ball is pocketed after contact with another ball; (3) the cannon, or carom, is a scoring sequence in which the striker’s cue ball contacts the two other balls successively or simultaneously. Each red ball when pocketed remains in the pocket, while the colours when pocketed, as long as any reds remain on the table, are placed on their respective spots. Finally, the six coloured balls must be pocketed in the order of their values.

All billiards games require the basic equipment of a table, cue sticks, and balls. The other principal games are played on tables that have six pockets, one at each corner and one in each of the long sides; these games include English billiards, played with three balls; snooker, played with 21 balls and a cue ball; and pocket billiards, or pool, played with 15 balls and a cue ball. In play, the object is to stroke the cue ball so that it hits the two object balls in succession, scoring a carom, or billiard, which counts one point. It may be inferred that it developed from a variety of games in which propelling a ball was a main feature. Different forms of the game tend to be played in certain groups of countries or areas of the world, though many of the games cross many national boundaries. The game of English billiards is most popular in Britain and the former empire countries. There are numerous varieties of each game-particularly of carom and pocket billiards. The traditional mahogany billiards table is still in use, but tables are now generally made of other woods and synthetic materials. With half of the Sun's radiation blocked/reflected in the opposite direction, the Sun now has a net thrust upwards (i.e. in the direction of the "hat").

Thanks to Duddly (now defunct but offered at the sims biker I believe) for the inspiration of his wardrobe-changing doors, Aenigma's site for the un-gapped door bases, what is billiards and The Tom and his thorough knowledge of sims' programming code. Altogether that's a mass of one billion tonnes of humanity jumping ten metres in the air. Suppose that there were ten billion people (another overestimate - there are about 6.4 billion at the time of writing). Which means the distance the Earth moves when everybody jumps will be one trillionth of the distance that all the people jumped: that is to say, 10-11 metres, or about half the radius of a hydrogen atom. Gravity assistance. This is a method originally proposed as a means of moving Earth to a higher orbit around the Sun in order to save it from the Sun's inevitable Red Giant expansion. Maybe the Sun is going Red Giant and you miss the days when lead didn't melt in direct sunlight. He then alternately pockets red and coloured balls. During play, when a player cannot hit the ball that the rules require him to hit (because of obstruction by another ball or balls), he is said to be snookered and loses his turn; this situation gives the game its name.

Note that the Earth does not and will not behave like a solid, rigid billiard ball under such huge impacts as these. It involves asteroids, like the above method, only instead of direct impacts, this time we just steer them past the Earth, allowing rock and planet to exchange a little momentum, with the result of an Earth moving on a slightly different track and an asteroid moving on a significantly different one. Basically, the point here is that modelling impacts like these is a tricky business. The major problem here is figuring out how to pick up big pieces of continental plate without breaking them. Belgium. Design them carefully so that when used the rocket engines do not actually just propel themselves through the ground and into Earth where they become useless - you may need to periodically dig them out again after several thousand years' continued thrusting, or else just build new ones over the top.