A very recent one for me was when I decided to cut the binding on the bias. I watched tutorials to figure out how to cut continuous bias binding. Ended up too short. Called a friend to pick up more fabric. She did. She even bought the rest of the bolt - just in case I had any problems. The 2nd strip I cut had the stripes going in the opposite direction. Yikes! No one warned me that could happen. My friend brought over the rest of the fabric so I could cut another strip. It didn't matter which direction the stripes went on this one. Now I have 200" of binding ready for a baby quilt. At least it wasn't a total loss.