Wade Davis discusses this in his TED talk.

An eskimo had all his knives taken from him, so he went outside, pooped in his hand and formed a knife from the poop. After he had the knife he then killed a dog and made a sled from it.

http://www.ted.com/talks/wade_...ngered_cultures.html

Jump to the 19:00 mark for the complete story.

He didn't use his own poop, he used bulls poop.

wow. umm if an eskimo craps in the tundra does the dog not smell it coming?

it was either a big dog or a small eskimo for him to make a sled out of its ribcage.

im not sure if i want to see them try this on TV. it would have to be fresh and very cold and i cant imagine wanting to see anyone do this.

and how sharp does your saliva have to be to make an edge? and what if u ate alot of fiber could u make it into a club instead?