I've been thinking about all the ways in which things could go wrong and what we could do that might help -- Mrs Longbottom, could you send us some polyjuice? Last night was show dueling; tonight could be dueling for real. If we have to, we could use polyjuice to swap in someone who really knows what they're doing against whoever's meant to be a victim for laughs.
Or if people need to escape in disguise, or -- whatever.
Or if people need to escape in disguise, or -- whatever.