The piece of material is just a square. Like a card table. The plan is to stitch around the edge. The Serger binds the edge and cuts off the excess, in one swoop.
Oh, oh. Down to two threads. Needle came unthreaded. The thread tower was down. Rethread, lift tower and continue.
Oh No - Down to Two Threads - Rethread
Simple edge. Just redo spot where bare because of no thread.