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Case in point. "Come Together" by the Beatles which is actually taken from Chuck Berry's "You Can't Catch Me"
Here Berry performs the song after an intro by Alan Freed in the 1956 movie "Rock, Rock, Rock". Berry sings about his brand new airmobile which is so fast that you can't catch him. Berry goes on to tell the story of driving on the "New Jersey Turnpike in the wee wee hours, rolling slowly cause of drizlin showers"
He goes on to sing a line very familiar to Beatles fans "Here come a flat-top" which is very similar to the "Here come old flat top" opening of Come Together"