The longest act I watched was a clown who called himself Pepe and involved the audience in street theater. As it went on the crown became quite huge, surrounding his "stage" and spilling from the street onto the sidewalks on either side. First, Pepe warmed up the crowd by posing for a photograph by laying laciviously on the cobblestones, revealing his bare shoulder to the audience. Then he took the camera from the photographer, and shot a picture down his pants. Then he had her come out of the crowd and set it up to take her picture, first by getting a man in the crowd to stand with his arm around her, and then getting a baby in a pram for her to push so it looked like she had a whole family.
Then he took two men and a woman out of the crowd to help him perform his melodrama. It was largely mimed, supplemented by his directing with a whistle, making motorcycle noises with a kazoo, and plenty of growling and shouting. He would act out the respective parts first and then the three reluctant volunteers would imitate him.