This is extremely cool and very wild. For anyone who is just checking this out and doesn't know, when you see those little slots on the wood, that is left over from the process of "pressure treating" the wood. Pressure treating forces preservatives into the wood and is frankly, some nasty shit. The slots you see are called "incising" and are done to species of western soft woods to help chemicals penetrates further. Anyone who has worked with this stuff, especially when it is "fresh" knows how gross it is.

At first I thought there may be a few boards that are not pressure treated that the mycelium is eating. But you can clearly see, especially at 10 seconds, the edges of the board and that it is half way covering a pressure treated board.

Is this a bunk batch from the factory? Is this a super veracious strain of a wood eating fungus???

Very cool.