Collarbones

[Tiger the Lion]

I quite like this. It is a lot like how I try to sketch a moment. I do agree that "Not purposefully, but not by accident." is a bit of a problem line. If nothing else, I think you would need to use purposely rather than purposefully for a better antonym to accident. At least if you were going for juxtaposition in that line, and not something bigger that I missed.