Re: What's the weirdest thing you've used as a hammer that isnt a hammer?
 

A rivet gun

An old algebra textbook

Re: What's the weirdest thing you've used as a hammer that isnt a hammer?
 

I was once at a science demonstration, and the scientist froze a banana and used it to hammer in a nail. then she destroyed the banana by slamming it with a hammer.

I've done that before with liquid nitrogen. It works surprisingly well.