What multiple Grammy-winning rock band got the inspiration for the lyrics of one of their Top 10 hits from a line in a horror movie spoof? What was the movie? What was the song? What was the line?

That's a tough one DG. I'am gonna try "Iron Maiden" with "edge of darkness"...that's all I have right now.

That is not he one I have, but if you can find documentation on the connection, I certainly will accept it as an answer. If so, then there are two answers.

Aerosmith, "Walk This Way", "Young Frankenstein" (?)

[As an aside, I doubt Maiden won any Grammy awards.]

Very good, Curtis. I'm impressed, although I should have known that, with your knowledge of music, you would be the one to get this.

The song title was inspired from a line in the movie Young Frankenstein spoken by the character Igor (played by Martin Alan "Marty" Feldman (1934-1982). - Wikipedia
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When this film was in theatres, Aerosmith was working on their third studio album, Toys in the Attic. They had written the music for a song but couldn't come up with any lyrics to go with it. After a while, they decided to take a break and go see Young Frankenstein where the "Walk This Way" gag provided the basis (or phrase) for the Aerosmith hit "Walk This Way". - Wikiedia

Well, thank goodness that one's been resolved. I've been working on this since the question was first asked and was getting nowhere And VERY well done to Curtis!