Revealing mistake: When the doorman initially refuses to let Dorothy and friends into the Emerald City, they protest, saying the Good Witch of the North sent her; they show him the ruby slippers as proof. As the camera pans down to the slippers, look at the yellow brick road Dorothy is standing on - it is flat and looks as though it was simply painted.
Revealing mistake: In the forest scene when they walk up to the warning sign, watch and you'll see the Scarecrow's stick bend like rubber.
Revealing mistake: When the Wicked Witch throws the ball of fire at the Scarecrow, you see the Tin Man get down on his knees and take off his hat to put out the fire. If you look really closely, you can see several hairs on the Tin Man's head.
Answer: Another fine example of the Mandela Effect. None of the "making of" books reference this alternate ending. The original book ends with Dorothy losing the slippers on her journey back to Kansas.
wizard_of_gore ★
I also remember this scene; however, I remember it in a television movie, and it was at the beginning, not the end, of an entirely different movie.