Well, now, there's an interesting and unique thread that hasn't been posted before. Congrats, Cristina!
Music has an effect on creating an eerie scene. I'll offer an off-the-wall example:
In GFII, I think the scene where Michael and his bodyguard (in their car--a red-and-black 1958 Ford Custom 300) are following Johnny Ola (in his or Roth's car--a 1958 Chrysler New Yorker) to Roth's home in Miami, is a legitimately eerie scene. Michael and Kay have narrowly escaped with their lives after the Tahoe shooting. Michael is surrounded by people he can't trust (except for Tom). He's in the hands of some bodyguard we've never seen before (and who looks very menacing). And now, in that scene, he's driving slowly through seemingly alien territory, being directed by the right-hand-man of the guy who we are about to discover directed the hit. Hair-raising enough. But that ominous music is what makes the scene so eerie.