You're aware of the Cinnamon Challenge, yes? That somewhat/completely ridiculous oral endurance test that demands that you swallow a tablespoon of ground cinnamon in less that a minute without drinking anything? Many have tried, most have failed and now we can count Game of Thrones' young Arya Stark among that sad number.
It's a ridiculous pastime, really. But girls will be girls and—given how deadly serious things have been for Arya on Game of Thrones—it's actually refreshing to see Maisie Williams just being a giddy British teenager.
However, I do wish Williams' Cinnamon Challenge were more noteworthy: If she either succeeded or vomited like a soldier on the Wall, then this would be something more than just endearing. It'd be epic.