Lyrics to the song in Buffy's prophetic dream during the episode Hush (Season 4 Episode 10)

Can't even shout
Can't even cry
The gentlemen are coming by
Looking in windows
Knocking on doors
They need to take seven
And they might take yours
Can't call to mum
Can't say a word
You're gonna die screaming
But you won't be heard

The song clues the Scooby gang in on what the gentlemen do:
They need to take seven
And they might take yours

Refers to the seven hearts they need to collect
You're gonna die screaming
But you won't be heard

Refers the fact that the Gentlemen take away their voices
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