"If the main trim duct chatters like gravel, or you hear the draw drop an octave, if it sounds like it’s choking on a slug of heavy cardstock, you let it work through.
[WP] The hardest part about being a shapeshifter isn’t that it’s hard to get people to trust that you aren’t going around impersonating whoever you can just to cause chaos, it’s that you always cause the uncanny valley if you get so much as a hair out of place.