Jill Biden and Symone Sanders rush protester off stage during Joe Biden's victory speech

There were a lot of surprises this Super Tuesday, and one of them was just how fast on her feet Jill Biden is.

During Joe Biden's Super Tuesday victory celebration, the former second lady intercepted a protester who charged at her husband while he was speaking. Symone Sanders, a senior adviser to his campaign, also rushed to jumped in to haul the woman off stage.

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The protest interrupted a jovial speech from Biden, who won several crucial state primaries on Tuesday evening. As he proclaimed that the middle class built America — and unions built the middle class — a woman rushed onto the stage waving a sign that said "Let Dairy Die," and screamed out the phrase as well.

She was quickly whisked away, but another woman with a similar mission then made her way onto the stage. Jill Biden and Sanders took immediate action to remove her from the stage. Both protesters received boos from the crowd.

The jarring moment predictably went viral, prompting lots of online commentary:

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Sanders took the moment in stride, tweeting that she "broke a nail":

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Despite the disruption, Biden resumed his speech. This protest comes several weeks after topless dairy protesters stormed the stage of a Bernie Sanders rally in Nevada, calling for the same mission of "Let Dairy Die."