How do Doug and Dave do this?
http://www.bltresearch.com/magnetic.html
http://www.bltresearch.com/plantab.html

Or this

Careful planning, and a good stomping stick.

Sorry, that doesn’t explain node expulsions or weaving.

moving, I don't have a problem giving my honest answer to your
question: I don't know.

What's a node expulsion? And what do you mean by weaving?

I think moving was speaking of the expulsion cavities in the plant nodes.


(4) Expulsion cavities (holes blown out at the plant stem nodes), usually found in the 2nd node beneath the seed-head, but in recent years discovered also in the 3rd and 4th nodes all the way down the plant stem. A darkening of the stem node, particularly when expulsion cavities are present, is usually the result of the growth of an opportunistic fungus (Ustilago tritici) which quickly forms on the exudate released from inside the plant stem.
http://www.bltresearch.com/plantab.html

MIT gave it their best shot and came up short.
http://www.swirlednews.com/article.asp?artID=645