Musk was photographed chatting with fellow billionaire Jeff Bezos at a pre-inauguration dinner — but the woman next to him caught even more attention.

President Donald Trump's "first buddy," Elon Musk, was seemingly everywhere in D.C. on Inauguration Day. Where (and with whom) was the billionaire?

After telling the audience "thank you" for reelecting Trump, Musk appeared to grab his chest and then forcefully extended his right arm fully into the air with an outstretched straight hand while making a grunting noise. He then turned around and repeated the gesture before touching his chest again and telling the crowd, "My heart goes out to you."

National Security Counselors, a public interest law firm, plans to file the lawsuit shortly after Trump's noon inauguration.