Does anyone know where I can get one of those cueballs that has a hollowed core and some type of weight in the middle, so when you try to hit it straight it curves off in all directions? A friend of mine had one of these a few years ago and I haven't heard of or seen one since. Put an object ball in the jaws of the pocket at one end of the table and put the tricked up cueball at the other end of the table, you won't make it if you shoot straight at it. It makes a rattling noise while it's rolling and suddenly veers off to the side.