That's pretty cool!

I have a pretty old collapsable fly rod that appears to be designed to use as a sort trekking pole when it's collapsed. I don't remember how I wound up with it, but it looks to work on about the same principle as the Tenkara type.

I'll take a closer look at it. I'm sure it must weigh more than the one Jason used for your review, but it's still kind of cool.