Ghost in the machine

Well it looks like I was wrong. For now, anyway. I have taken my machine apart about 40 times and filing parts and oiling tightening bolts and loosening them, changing the tension, cleaning the machine etc,. and trying to figure out what is going on. I usually can figure it out but this time it was different. Nothing seemed to work. I changed the bobbin thread 2 times and then changed the bobbin color and now it works. What the---?@#$#!! Have you ever thought that your machine is out to get you? Mess with you for a while. Well that is what I think was going on here. Now I am back in business and things are going well.