I have a bunch of 2x8 that I took out of a heavy duty shelf that made like 8 years ago. well one of the boards had a about an 8" crack on one end so I cut that part off with the miter saw then ran it through the planer. Anyways I don't know if it was that same board or not, but when I took it out of the planer and placed it off to the side, the entire 48" board split right in half length wise almost a straight line all the way down the middle. So what's up with that? I dont want that to happen again when I run these boards through the table saw. I was just trying to make a little table out of some wood I had laying around with no use for.