Losander's version of the Zombie Ball is amazing, but his method/gimmick is different from the original Zobmie Ball. Losander's version is very expensive, but well worth the price if you are serious about this effect. Just thought I should point that out since you will not be able to perform all of the Losander moves with the original Zombie Ball.
For those who are interested click here
to see Dirk Losander performing his standard zombie ball routine. This is the basic routine he teaches on his video and on the video he also shows you how to make his modified gimmick. One of the great things you can learn in watching Losander is how he creates a disconnect between himself and the ball by keeping his hands/wrists very still when the ball moves , and also how he constantly maintains very deep "valleys" in the cloth covering the ball , so the way the cloth hangs off the ball does not show any straight lines from the ball to his hand . This is very important. Many performers are not careful about this detail and they stretch the cloth taut over the ball so that the folds don't hang down , and there is too much of a straight line from the ball to the hand and it makes it look like the hand is manipulating the ball. Losander's use of the deep folds in the cloth help to sell the floating action of the ball. Losander's "covering move" is great , where the ball is up on the edge of the cloth, then he pulls the cloth up and over the ball to cover it. During this move the ball appears to hang in space , not moving, while the cloth is drawn up and over to cover it . Master that move and you're on your way to a very convincing floating ball.
A lot of the moves come from Al Schneider's book "Al Schneider on Zombie" via Tommy Wonder who mastered Schneider's zombie moves and taught them to Losander . Losander in turn has boiled down the moves into a very elegant routine with a very convincing illusion of floating. The acting and the body language are still 95% of the illusion, but Losander's modified gimmick does help. Watch the initial rise of the ball from the pedestal : Losander's hands are very still while the ball rises up. You can't do that with a standard zombie gimmick.