In the 1986 movie 'Labyrinth,' David Bowie had a stand in juggler! The way they filmed it is insane...
In the movie Labyrinth, the sphere juggling scene shot in the girl's bedroom is one of the magical scenes in the film. Jareth, the elven king, played by David Bowie, juggles multiple 'crystal' spheres to enchant Sarah with his powers. But David Bowie couldn't juggle—and he didn't!
The film makers used the hands of master juggler, Michael Moschen. What makes this an incredible fete is the fact that Moschen had to lean down forward behind Bowie to stay of camera, put his arm through under Bowie's arm, and juggle five spheres in one hand blindly! He could not see his hand nor keep his eyes on the objects he was juggling!
David said: "I had fun. I found it rather amusing. I don't think Michael Moschen had fun though. It was agonizing for him." A stand-in for Bowie was brought in so that Michael could practice between takes. Bowie was very patient during filming as the scenes had to be shot again and again (quite a few times) before Michael could perfect his blind juggling.
It was backbreaking work for Michael Moschen, but the finished product is an absolute masterpiece! Labyrinth has become a cult film since it's release in 1986.