I chopped down a tree, and one of the logs landed on a boulder. I am unable to interact with the log in any way, however I can still chip stone off of the boulder. While I could just carve the boulder into a runestone-thingy, it would seem as though logs should "roll off" of stuff when they land, OR actions should stack like so RightClick>Flower Menu{Boulder{Chip Stone} Log{Chop into Blocks, Make Boards} (Sub-menus)