[1] The program begins with John Cleese (ostentatiously portraying himself) speaking "live" from a table at the Grill-O-Mat snack bar in Paignton; followed by the opening credits.
This later followed an animation of the society entering a mech-like figure and as they manage to control it, they end up defeated by another one before Sir William is knocked into "The Last Supper", spilling an entire bottle of Chateau Latour before he is sent into a cloud where he reunites with the other members.
Eric Idle plays an innocent-looking but seemingly accident-prone man who enters an establishment called 'Prawn Salad Ltd', and is blamed for setting off a series of catastrophic events.
[2] During the course of about a minute of sketch time, circumstantial evidence relentlessly piles up indicating that Idle's character breaks an expensive mirror, knocks over an ornate bookcase, fatally stabs the maid (Carol Cleveland), causes the handy man to fall out the window to his death, induces an investigating policeman into a fatal heart attack, collapses the roof in on the butler who was trying to help the policeman, and finally, causes the entire 'Prawn Salad Ltd' building to explode.
The running gag of the skit is that while everyone in the sketch is convinced of the Idle character's complicity, the viewer is perfectly aware of his innocence in the series of events.