The only thing that comes close is when I was "just" going to finish that one square before calling it a night, and when the square didn't fit, I quickly cut it to size. .....Did I move it OFF the quilting squares that were DONE and the were SQUARE? No - wonderquilter here didn't need to use any precautions - wonderquilter had to redo a bunch of squares coz I cut right through the stack. Homer moment: DUH! DUH! DUH!
Common theme: being tired. Not a good cutting/sewing/quilting time.