What quiltedsunshine points out is exactly what happened to me when I was using a thread holder positioned at the back of my Husqvarna. I was aware of this possibility from reading a posting on this board. I thought I had taken enough steps to prevent this but . . . . no it happened. My machine started to really struggle and finally it was just about ready to quit when I finally noticed the thread was winding around the hand wheel. It was was a bear to untangle because as soon as I exerted pressure on the thread it would break. I was about in tears as my husband picked this machine out and gave it to me for Christmas. After working for several hours I was finally able to remove the hand wheel and clear all the mess out.