screen is not acting; after the  shot was done, Alfalfa grabbed his brother Harold Switzer (qv) and  said, "Cmon, Harold; lets go kick their ass," and a fight almost  broke out between cast and crew members. It is speculated that the  vegetable toss (which was done by the crew members for this shot,  not the kid opera attendees seen in the wide shot) was payback by  the crew for having had to endure the pranks, tantrums, and other  mischief Alfalfa regularly caused on the Our Gang sets.