11. While watching TV, Homer's convinced to purchase Spiffy, a product used by Dr. Nick Riviera to clean the gravestone of which famous American writer?
From Quiz "Saturdays of Thunder"
Answer:
Edgar Allan Poe
At home, watching 'I Can't Believe They Invented It!', Homer seems utterly convinced that Dr. Nick Riviera's new product, Spiffy, is worth buying, especially after he uses it to wipe the grime off Edgar Allan Poe's tombstone. ("Quoth the raven, what a shine!"). When the deal works itself down to four bottles, an applicator glove, and a State of Kansas Jell-o mold for $29.95, he can't resist...but is unable to call when Patty and Selma show up.
Oh yeah, and during all of this, Bart keeps asking for power tools.