I came here to nominate another Chicago song – “Beginnings” – which is such a moving love song yet incongruously ends with an extended jam on cowbell.
Stevie Wonder’s electrifying track “Do I Do” (1982) fizzles out at 9:00 with Stevie attempting to rap:
“I know I cannot rhyme, 'cause I ain’t like a friend of mine
But I ha ha ha ha”