Fun Fact of the Day: Producer Irving Thalberg would often call people in for meetings, and then keep them waiting in his office for hours while he attended other meetings on the MGM lot. One day, during pre-production for A Night at the Opera, Thalberg kept The Marx Brothers waiting for several hours in his secretary’s office, while he was in his own office making phone calls. When Thalberg’s secretary went home for the day, the brothers decided they’d had enough. They pushed the office file cabinets against Thalberg’s door, trapping the producer in his office. Afterwards, Thalberg kept his appointments with the Marx Brothers, but would often interrupt his meetings with them and step out to attend other meetings - again keeping the brothers waiting for hours. One day, Thalberg came back from another meeting to find Groucho Marx, Chico Marx, and Harpo Marx sitting in his office completely naked, and roasting potatoes on sticks in his office fireplace. Thalberg sat down with them, had a potato, and never missed or interrupted another meeting with the Marx Brothers.
tl;dr -After a producer kept them waiting outside his office for hours, the Marx Brothers put all the furniture in the waiting area against his door, trapping him inside