Continuity mistake: The amount of people outside the church during the wedding changes. When we see the view from the inside of the limo, it's a handful. When we see the scene with the fish thrown out of the window, there are many more.
Continuity mistake: When Max is pounding the ice with an axe after losing his fishing pole, John and his dad stop to buy cigarettes and beer. Pop has a fresh cigarette in his right hand when he grabs the beer, but when he turns around, it's gone.
Continuity mistake: In the scene when the IRS man attempts to pry open John's door, he gets one board slightly off. In the overhead shot, the board is completely off and on the ground.
Answer: John Gustafson and his wife, May, were divorced after 20 years of marriage.
Charles Austin Miller