I think it would be cool to hear about some foley sessions that people have done that involved recording very odd things to get a desired sounds.
For example, I did a foley session with a friend of mine a few years ago when I was working on sound for my mobile game Aries Revenge. We took 2 plastic bags and wrapped them tight around the end of a stick. We then lit the bags on fire. If you hold your mic about half way between the bags of fire and the ground you will hear a "Zipppp" sound from the melted bits of plastic falling off the stick to the ground. I ended up using that sound as the foundation for the main laser weapons fire sound for Aries Revenge.