Crazy as a Soup Sandwich - S3-E29
Continuity mistake: The close ups show Lancaster's henchmen, Gus and Bork, together dressing Teddy bears behind Arky, but in the shots of Arky, Gus suddenly disappears.
Crazy as a Soup Sandwich - S3-E29
Revealing mistake: The Styrofoam head Gus tears in half shows it has been pre-cut, making it easier for him to rip in half.
Crazy as a Soup Sandwich - S3-E29
Revealing mistake: The supposedly heavy cardboard boxes Gus, Bork and Arky pile against the door are very light and obviously empty.
Crazy as a Soup Sandwich - S3-E29
Other mistake: The actor playing Gus misses lifting a box to throw, and just makes a throwing motion with his empty arms.
Crazy as a Soup Sandwich - S3-E29
Continuity mistake: As Lancaster dusts off the urn, the overhead camera shot shows Gus with his hands clasped behind his back, while the instant front view of Arky shows Gus' hands at his sides.
Answer: Poisoned food, heart attack from eating too much food, or he slipped in the shower. The list is endless.