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Zig Zagged: Grandpa has Alzheimer's and is giving a long rambling, but when Big Brother leaves the home, he suddenly gets very coherent. It turns out the Alzheimer's was a lie. Then, he smokes some of the good stuff while he has a chance and starts rambling again... Until he gets a moment of clarity and starts to make sense again. HOWEVER, when Big Brother leaves the next day, grandpa starts rambling for no reason...
No elderly characters appear in this particular story.
Deconstructed: People find grandpa so boring that they avoid him and he ends up alone.
Reconstructed: Then someone actually listens to him and realizes how wise grandpa is. Even if there is no point to the story, it's the history and the journey that matters.
Plotted A Good Waste: As grandpa's long boring story goes on, it is obvious there is some truth to the story. Eventually, he starts talking about where he hide his stash of Nazi Gold from the war (he is too screwy to realizing that telling people that can get it stolen). The thing is, the family is short on cash and in desperate need of aid. But they never checks up on this and just put him in the retirement home.
Played For Laughs: The listener keeps trying to leave, but is polite to just tell grandpa that he's boring.
Played For Drama:
Grandpa Bob's family realizes he has some serious problems, and he doesn't.