[creeble]

And/or a really long spring:

https://www.nshos.com/HAMMOND17.htm

I have a couple of these lying around, but they're useless in a portable application.

[squarefoot]

If you have a slinky around, that would make some interesting horror-like sounds.

https://www.youtube.com/watch?v=oXItDwgf6hM

Not quite portable, however.