I don't have a table, so I have to improvise in order to practice. Here's a small video I made that shows you how you can practice jumping without a table. Terrazzo floor works just fine and I use a piece of table cloth, otherwise it's hard to keep balls in spot. In this video the balls are pretty far apart from each other and it's a little bit hard on the floor because you have to seat in uncofortable position. When I get a camera or someone to help me videotape, I can show how you can practice close jumps( where the balls are almost touching, less than a credit card width away)
http://www.youtube.com/watch?v=0u5YmUZkTdw
http://www.youtube.com/watch?v=0u5YmUZkTdw