This photo of what Joe Biden did outside a DC movie theater is going viral

A bystander snapped a photo of former Vice President Joe Biden talking Thursday with a homeless man and the picture has since gone viral on social media.

Caleb Baca took the photo that shows the exchange outside of a movie theater in Washington, D.C., where he reportedly brought his granddaughter. In the photo, Biden appears to be giving something to the man.

What did Biden give him?

"I'm not exactly sure what he gave the homeless man, but he appeared to write something down on a piece of paper inside the movie theater, which he then proceeded to give the homeless man outside," Baca told WTTG-TV.

Baca's photo was shared on social media by D.C. Public Affairs consultant and businessman Paul Equale. The post received almost 100,000 shares and more than 142,000 likes on Facebook by Sunday afternoon.

Equale added the caption: “Character is about what you do when no one is watching.”

Meanwhile, Biden is making headlines as he returns to the campaign trail to boost the Democrat party’s chances in the midterms. He campaigned this week for Conor Lamb, the Democratic candidate for a special election in Pennsylvania's 18 congressional district. There is also speculation over whether Biden will make a presidential run in 2020.

What has Biden said about having compassion?

Back in 2015, Biden spoke about compassion to Yale University’s graduating class at a time when his son was terminally ill.

"It's not all that difficult, folks, to be compassionate when you've been the beneficiary of compassion in your lowest moments...because when you know how much it meant to you, you know how much it mattered," Biden told the graduates. "It's not hard to be compassionate."

Part of it is being there for a friend or colleague when they are experiencing difficulties or when they’re celebrating some of their greatest life achievements, he said.

“It's about being available to them when they're going through personal loss,” Biden said. “It's about loving someone more than yourself."

Biden is no stranger to loss and difficult times.

His son, Joseph R. Biden III, also known as Beau, died from brain cancer in 2015 at age 46. Biden later thanked the public for the outpouring of compassion and kindness.