Prop, Prop, Whiz, Whiz!

Prop, Prop, Whiz, Whiz! is a Bart Simpson's Treehouse of Horror story featured in.

Plot
Bart visits the The Android's Dungeon & Baseball Card Shop and wants to go to the bathroom but Comic Book Guy requires that he buy something for $10. After looking Bart finally found a Radioactive Man figure which he buys. After Bart went to the toilet, he discovers that the Comic Book Guy has movie props in his stores. Comic Book Guy tells him that they're cursed and that he bought them on Ebuy and those assigned to the warnings he saw. Comic Book Guy says that he tried to resell them but anyone who touches them becomes trapped in the movie or TV show they came from. Willie is stuck in X-Men, Krusty in  and Moe, Barney, Lenny and Carl are in Ghostbusters.

Milhouse and Lisa come in and ask Bart to come with them to see a movie at the cinema. Lisa sees a wooden stake in the store and before Comic Book Guy can warn her she touches it and disappears. Milhouse wonders where Lisa went and Bart says that the props are cursed. Milhouse decides to rescue her by touching another movie prop before Bart can warn him that he can't follow her with a different movie prop. Bart becomes suddenly interested in a book in the store and disappears as well. Lisa appears in the world of  in a cemetery as where a vampire attacks her, which she kills with the stake. approaches her telling her that she is the chosen one. She is then quickler joined by, , , and , the latter two both claiming to be her boyfriends. Giles asks her to visit the library to research a plan to get rid of all the city's monsters. During the visit in the library, various monsters show up, but Lisa manages to kill them by accident when she pulled out a book from the shelf. Bart appears in the world of  and appears in a forest as. He begins running from something chasing him, but when he realizes that he has a chainsaw, he promptly kills it, along with a ghost that appears shortly after. A hand soon attacks him and starts choking him, but he easily manages to crush it with a rock.

Milhouse appears in the world of  as, constantly jumping between various jobs without warning, each time asking, "What's happening?". Homer later comes into the comic book store to find Bart and Lisa, and before the Comic Book Guy say something Homer takes hold of a lightsaber from the store and disappears. He appears in the world of Star Wars as just as  is attacking him. When Homer starts choking him, Obi-Wan escapes to higher ground, and Homer is left to burn due to being too tired to climb up after him. He wakes up later as Darth Vader, screaming because there is no beer in space. Comic Book Guy realizes what he must do and starts to destroy the movie props. After he destroyed the first prop, Krusty appears in the store and Comic Book Guy understands how he can save everyone. All are rescued but they still look like they did in the movies and shows they appeard in. He then decides to offer them five percent discount on all comics in the store to make up for what happened. After they leave the store, only one item is left, from Star Trek. Comic Book Guy touches it and finds himself in the holo deck, left to wonder whether he had actually been transported into the world of Star Trek or if his whole life had been merely a simulation. He grows excited at the prospect of abandoning his previous life for something excitin, only to find that he is to work with the paperwork side on the ship, something he had not hoped for.