Bloodrock - D.O.A. (1970)
www.youtube.com

Instead of lyrics, I'll proffer...

D.O.A. (song)
en.wikipedia.org(song)

... "D.O.A." is a song by Texas hard rock band Bloodrock released by Capitol Records in early 1971.

Synopsis

The song is sung from the perspective of a man who has, temporarily, survived a mid-air collision. In his dying words, he describes in graphic detail what he remembered of the collision and his current condition: his arms have been severed, his co-pilot is already lifeless beside him, blood is rapidly leaving his body and pooling underneath him, and a paramedic indicates that no medical intervention can save him from imminent death. Ambulance sirens are heard at several points in the song; at the end, the music slows down and drops in key, simulating the narrator's loss of consciousness and death.

The initials D.O.A. stand for dead on arrival. ...

The ambulance siren at the end of the song, it just shuts off.

Yeah, back in the day, this song made a deep impression.