Today Barack Obama helped give Joe Biden a boost, debuting a video the pair did, on his social media channel. He blasted it out to his 175 million followers combined on Twitter and Facebook (by contrast Biden has just 9 million followers total on both platforms).

The video is being called “a socially distanced conversation.” In it, the former vice president talked with former boss about how Donald Trump “can’t relate in any way” to what people are going through. ” The Washington Post writes that the video “serves both to troll the current president and send a signal that Obama will start playing a much more active role in the campaign.” Here are a couple of remarks that should get under Trump’s skin.

Obama: “I have confidence you are actually going to listen to the experts. You are going to pay attention to the science and you’re not going to quit…”

Biden” “Can you imagine standing up when you were president and saying it’s not my responsibility. I take no responsibility.”

Obama “Those words didn’t come out of our mouths when we were in office.”

Watch the full conversation above.