I don't think I have ever heard the "thunk". I change needles when I have to change presser feet. I mean I'm sewing along with my quilters foot, and decide, "Oh, this would be a good place for a zig-zag." I push the button for zig-zag, and it's more like a "Bang". There went another needle! LOL I'm getting better though. I have been breaking fewer needles than when I got my new machine about 3 years ago.