Babyface 2 (1986)

Pornographic. A young woman's girlfriends throw her a "bachelorette" party shortly before she is to be married, and they hire a male stripper (Jamie Gillis) for the occasion. As things get hot and heavy, however, they also tend to get a bit out of hand, and the result is that they wind up humiliating him. What they don't know, however, is that he's not just your average male stripper--he has "magical" powers, and he uses those powers to take his revenge on the women.

At 53:40, Kevin James seems to be learning to juggle. In just over a minute he starts to juggle 3 tennis balls many times. We never see him drop, but he usually stops cleanly after 1 or 2 throws. We do see him get a few clean runs of 3 throws and catches.