A Pennsylvania Coach wroteI just tell the jumpers "one bounce, then it is going up" and toss.
I would not want to tell them that, I would not want them to "steal" the tip.
I just tell them, "I need the middle" so they give me enough room to bounce the ball. Then after I determine how many times I choose to bounce the ball, I throw it up without telegraphing the toss. Most jumpers are surprised that I was going to throw it up.
Peace