Subverted: Profundo cackles, the orchestra swells menacingly, the heroes shiver... and then he launches into an interpretive dance.
Double Subverted: Midway through the dance, he starts to sing.
The hero kicks Profundo in the groin, but he sings his whole song - in falsetto.
Profundo's song has the music playing from a record, which ends up getting stuck in a loop partway through the song.
Zig Zagged: Profundo is killed during the first verse. Shortly thereafter, he's resurrected as a singing zombie, but is pushed into an incinerator before the end of the first verse. After that, Profundo's ghost appears to continue the song, but the hero exorcises him before the second verse is finished. Later, the hero admits that he really wanted to know how the song ended, and makes up the rest of it himself.