A cool instructable on how to make your own chainsaw that will fit in a pocket or packpack. This would be very handy for campers or hikers. It would also be a good thing to have in a bug out bag. If you want to make your own pocket chainsaw head on over to Instructables and check out the tutorial.

Make your own Pocket Chainsaw
http://www.instructables.com/id/Pocket-Chainsaw/?ALLSTEPS