Footage from the Washington Hilton shows the sequence of events as they unfolded. While many people sought shelter under tables, Trump administration officials were escorted out of harm’s way.

Initially, Donald Trump remained in place. An expert later observed that the contrast between the president and those around him was notable.

Body language expert “Dr. G” has now revealed why Donald Trump didn’t move.

“He looks indifferent, almost unimpressed by what’s going on around him,” the expert said. “If you look at the three people that he’s surrounded by… we’re all seeing the freeze response… Freeze is the first step.”

Dr. G, whose YouTube channel has more than 650,000 subscribers, went on to explain that what viewers saw in the clip was a “textbook” example of how people react to sudden danger, noting that “three of them are all freezing.”