LONDON -- It's surely only a matter of time before Donald Trump goes on a wild, 5am Twitter rant about J.K. Rowling.

The Harry Potterauthor has been aiming a steady campaign of social media-based ribbing at the President-elect for a while now -- and in the last week her volume of Trump-based burns have really peaked.

This one started when journalist Daniel Dale shared an extract from Michael Gove's recent interview with Trump. The question was one about heroes.

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That's a lot of rambling to pick apart, but -- luckily -- J.K. Rowling was on hand to condense it into a helpful 140 characters:

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Ouch.

Throughout the morning, Rowling has continued tweeting about Trump.

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We're calling it: he's going to tweet something negative about Harry Potterany day now.

It's only a matter of time.