Somebody who was present at the recording sessions for "An American Werewolf in London" wrote this account a few years ago:
http://hollywoodandallthat.com/2013/12/ ... -its-bite/There was also a lengthy discussion about this on the FSM board where the author expands his thoughts on some matters:
http://filmscoremonthly.com/board/posts ... &archive=0It's important to note that "Metamorphosis," while very similar, isn't the same music that was composed for "Michael Jackson's Thriller," though until doing a direct comparison (I write about this in the FSM thread above) I too thought it was the same music.
Also note that the track "Metamorphosis" on the City of Prague compilation is not only the unused transformation music, but following that is yet another unused cue, but that one I can't place. It's a mystery how much unused material was recorded during the sessions. It has also never been addressed why the Silva Screen compilation has re-recordings of two unused cues instead of cues that made it into the film (though it's a blessing that the unused material was re-recorded, especially if these cues weren't recorded during the sessions or if during the sessions only outtakes were recorded, and if one wants some of the tracks that made it into the film they can be found isolated in the stills section on the DVD/blu bonus features).
I have to imagine the idea of pairing "An American Werewolf in London" and "Animal House" (perhaps also including "The Blues Brothers" 'God' music) has been discussed by Intrada and other labels. All Universal, all John Landis films, all Bernstein. It seems like this would sell very well, but perhaps something is preventing it from happening. We know Universal is slow moving, so perhaps it's in the pipeline for down the road. I'm hoping a potential release of "An American Werewolf in London" will include some discoveries, either in terms of cues or more research about the score and the sessions.