Put a new needle in, phone rang. Answered, had long conversation with niece. Came back to machine, pulled thread to back, lowered presser foot, and chain sewed 15 sets of 4 1/2" squares. Used the thread cutter and started to pull the squares back to cut apart. You all know where this is going don't you.. well, duh. I never re-threaded the needle. Said a few choice words, went and had some chocolate, then came back and threaded the needle and sewed 15 sets of 4 1/2" squares together again.