Things don't always go right.

When upper or lower thread tension goes wrong... you can't ignore it... It's time to 'unquilt! I have found it works best to seam rip every 2 to 3 stitches from the back side... then turn your quilt to topside and use my favorite slant edge tweezers to lift loosened top thread. After that, I am always worried the stitch holes will show on the finished product, so it's worth a little quilting down time to bring in my trusty water spray bottle to help fluff things up.

I spray the recently "unquilted area."

Then carefully using my finger move the wet fabric back and forth closing up the vacated stitch holes.

Once dry... the fabric looks pretty much like it started and is ready for quilting.