Yes. Indeed, I suspect I've told this story before on LW in just such a discussion.

I don't necessarily buy your account -- it might just be that our brains are simply not well-integrated systems, and enabling different channels whereby parts of our brains can be activated and/or interact with one another (e.g., talking to myself, singing, roleplaying different characters, getting up and walking around, drawing, etc.) gets different (and sometimes better) results.

This is also related to the circumlocution strategy for dealing with aphasia.