Det händer i " Radio Flyer " från 1992. Från Wiki :
Mike (Tom Hanks) is observing his two sons fighting; with one insisting that a promise doesn't mean anything. To make them understand that a promise does mean something, he tells them the story of his youth. Young Mike (Elijah Wood), his little brother Bobby (Joseph Mazzello), their mother Mary (Lorraine Bracco) and their German Shepherd Shane move to a new town after their father/husband leaves them. There, Mary marries a new man named Jack (Adam Baldwin), who likes the others to call him "The King". Unbeknownst to Mary, the King is an alcoholic who often gets drunk and beats Bobby.
The two boys, seeing that their mother has found happiness at last with the King, are reluctant to tell either her or the police about the abuse. They instead try to avoid the King by exploring and having adventures amidst the turmoil and traumatic experiences. In the process, the two devise a plan for Bobby to escape the King once and for all.
Vid en tidpunkt kommer mamma och hennes 2 barn över en "old west" -utställning som egentligen bara är en buffel i en penna, och den exakta scenen du beskriver beskriver utspelar sig. Här är trailern: