Well, he still wouldn't come out tonight. I brought the bamboo down to the basement where I keep the saw, but I just couldn't risk it. He was wedged right by where a seam in the bamboo was, so I would have to cut pretty close to his nose or rear. Instead, I filled the bamboo up with water right to where his eyes were and I swished it around in case his waxy skin was stuck to the bamboo walls. Then I tapped the edge of the bamboo against the counter until his nose and one arm were sticking out the front. When I put my finger against his hand, he grabbed on and I pulled him out! He looks a little reddish on his sides and is very dark in color, but is otherwise fine. I stuck a few crickets in for him, but he is more interested on sticking to the wall right now. Maybe he'll change his mind later.
I am NOT putting the bamboo back in his terrarium. Maybe my baby geckos can use it more responsibly.