Bamboo Fire Saw

I recently tried the Bamboo Fire Saw method of producing fire. I have not been instructed in this method, though I have seen pictures, videos, and read about the process.
There is a large stand of Bamboo next to a creek near here, so I made my way there to gather the necessary materials. I wanted to go into this endevour with the assumption that I did not have my bow drill set with me, nor tinder, so I gathered tinder along the way. I did have my stone knife, but I was reluctant to use it, since I was trying to produce and ember without the usual tools I have with me, or with no tools at all.
I hadn't been in this patch of Bamboo in quite awhile, and so I spent a bit of time exploring while I gathered materials I would need. There was a faint smell of skunk, as well as a pile of bird feathers (unsure what kind, they're grey and very common to find around here).

In this photo you can see a dark groove in the bamboo, thats where I was sawing away to produce some dust to form the ember. I did produce some dust, but it didn't collect very well. I did have some help from my friend, but we were unable to sustain the necessary endurance to get an ember.
After this attempt I did some research on the topic, and I found some great information on producing an ember with Bamboo in Russel Cutts' book, Wildfire: Fire Making Art. The method he illustrates is designed so that one person can do it. I plan on demonstrating that in this blog soon.
The method I attempted can be seen here (with success!)