I have a wonderful husband who does all the vacuuming in the house. This morning I was getting ready to leave for a quilt meeting when he turned the vacuum off and said "oops". Now I have a pretty good sized design board, but it is in the hallway. He forgot about the exhaust on the vacuum and blew several of the lower blocks off the wall. He had just made an extension so I could fit my One Block Wonder and the design wall now goes down to the floor... prime target area for the vacuum. He just has to remember to go down the hall in the other direction next time.