Stephen Colbert had his first live show since the start of the pandemic with a fully vaccinated audience and his friend, Jon Stewart, as his guest.

But Stewart caused a liberal meltdown by going all-in on the Wuhan lab leak theory in a rant that was part serious and part incredibly funny.

Check out this crazy take on reality from the Independent.

Many viewers condemned Stewart for his comments, with one person writing on Twitter: “He’s spitting harmful conspiracy theories… so that’s fun.”

“Oh my god Jon Stewart is a lab leak believer? Oof,” posted another.

A third said: “That was painful to watch. I feel like I just learned my favourite uncle is a conspiracy nut.”

The idea that Covid-19 could have escaped from a lab has long been dismissed by members of the scientific community, while others have derided such theories due to their connection with former President Donald Trump.

However, calls from his successor Joe Biden for a transparent investigation into the origins of Covid-19 have recently brought the theory back under the spotlight.