What is Joe Biden doing with his hand here?

It looks like Biden’s teleprompter went down during his coronavirus press briefing today, and his staff forgot to put a copy of his speech at the podium. pic.twitter.com/YVBz1QJK2R

— Francis Brennan (Text TRUMP to 88022) (@FrancisBrennan) March 23, 2020

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from http://twitter.com/realDonaldTrump
http://twitter.com/realDonaldTrump/status/1248476961933938688