A real stretch. Pulling your mouth around affects which words you hear.
Westly
Erica
E
D001696:Biomechanical Phenomena; D006309:Hearing / Q000502:physiology*; D006801:Humans; D009055:Mouth / Q000502:physiology*; D052580:Muscle Stretching Exercises; D014110:Touch / Q000502:physiology*