Star Trek: Deep Space Nine - End of the Set
In the last episode of season 4 "Broken Link" there is a fight between Garak and Worf near the end of the episode.
During the fight, Worf pushes Garak into a Jeffries tube door which knocks it out of its frame...revealing the end of the set. We can see a wooden scaffold and other pieces of equipment.
slow-mo will help