I once made curtains for my mothers kitchen windows form striped material, all nicely done, hung them up, stepped back to admire, and low and behold one curtain had striped going up and down, the other across, and one was shorter than the other, couldn't believe how I had just done that, anyway everyone had a good laugh and I still laugh now when I think of it, in my minds eye I can still see them hanging there.
However, I quickly got them down from there before too many people saw them !!