Black Knight

Martin Lawrence plays Jamal, an employee in the Medieval World amusement park. After sustaining a blow to the head, he awakens to find himself in 14th century England.

At 30:45, during a banquet scene, 2 jugglers are passing balls in front of the king's table. They are seen for about 12 seconds. Frank Jeffreys is on the left and Chris Julian is on the right.

The entire movie may be seen here.