[ Doctor is chewing on a straw and tapping his fingers rhythmically on the table edge when she approaches him. The wig he put on for the party is starting to get crooked from him scratching his head thoughtfully and the hat he was wearing is in his lap. ]

Contemplating the invention of a straw that adds to the fizziness of a liquid when you drink through it. Bubbles are at least half the fun of drinking sodas.