In order for any pool game to function, all billiard balls must contain a center that is precise in weight. In turn, these exact specifications will cause the ball to maintain a specific balance that never allows it to falter.
Unless, of course, you happen to be a Crazy 8 Ball.
Weighted in such a manner that it's intentionally off-center, the ball will wobble and lurch as it rolls around the table. Guaranteed to fool your friends, it's good-natured fun that will get a laugh out of even the hardest of pool hall junkies.
Warning: Unless you're interested in a pool stick where the sun don't shine, don't even think about busting this puppy out during Tournament or Championship Play. When a large sum of money's involved, these guys are rarely amused. This also goes for the ones that tell you your fortune.
Also Available: The Aramith Crazy Cue Ball