You are hanging that beautiful blue and yellow wallhanging in your daughter's room and all of a sudden you see that one small half square triangle that is rotated 1/4 turn from where it should be. You scream and then swear that you will never tell a soul since it's not that noticeable. Then your daughter comes in the next morning and says "Mom I couldn't sleep last night and I was counting the squares in that wallhanging, and did you know that......" well, whatever, it is what it is. Things happen.