So, I'm putting a ruffle on the bottom of my daughter's dress. I sew together the narrow ends of four long rectangles, forming a loop. Then I run a line of stitching all the way along the top edge of the loop.
Except, the line of stitching does not end on the top edge. It ends on the bottom edge. Turns out, I've sewn the loop in a mobius strip.
I think I fixed it. If my daughter puts on the the dress and ends up in some alternate dimension, it will be time to pull out the cosmic seam ripper.
Now to think of a story involving a mobius dress...