Brubaker (1980)

Henry Brubaker is the new warden at Wakefield prison. He makes his entrance as a prisoner in order to get a convict's view of the real state of the institution. To his horror, he finds all manner of abuse and corruption, which after disclosing his real identity, he sets out to correct.

In the seventh minute a prisoner juggles three balls to entertain the prisoners' families at a picnic as Redford walks away from the donkey polo match, just before the cut to the "political debates." The juggling appears in the background for less than a second, and was performed by Philip E. Plubell, also known as Philip the Foole.