I thought I would share a recent experience with wood movement.
I'm building some jewelry boxes from "stringy" red mahogany. I cut the pieces to lengths of about 36 inches and ripped them to near-final width, and then followed my normal procedure to flatten the stock. Not owning a jointer, I flattened one side of each board with handplanes, then ran them through my planer, flat side down.
This procedure always works. . . .but not this time. After running them through the planer, each of the pieces was significantly twisted and even a little bowed.
So I thought to myself, I must have done something wrong. Again I flattened one side of each board by hand (I hadn't planed to final thickness the first time) and again ran them through the planer. The same result: all boards came off the planer twisted and bowed.
I guess this just proves how "interesting" wood can be.