What is a website where I can download free sound effects--thunder, glass breaking etc.?

Answer 1

Here is the best site for that

http://www.findsounds.com/types.html

Answer 2

Well, you could go to:

http://www.partnersinrhyme.com/pir/PIRsfx.html (only some of theirs are free, though.)

http://www.a1freesoundeffects.com/noflash.htm

I personally like:
http://www.sounddogs.com/catsearch.asp?Type=1 (it says you have to order them, but you don't.)

This one you have to register to get the sounds, but registration is free. It's got a nifty search tool...
http://freesound.iua.upf.edu/index.php

Hope that helps!

Answer 3

Goggle the word foley.