Piers Corbyn was filmed in a flash mob chanting a bizarre song in protest against having to wear face masks on trains.
He is part of a group of anti-maskers on a London Tube train chanting "wearing a mask is like trying to keep a fart in your trousers".
The video has emerged today and shows the group repeating the same line over and over again.
Piers seems to be so enthusiastic about the embarrassing chant that he waves his arms at one point as though conducting.
He is then seen ripping a sticker from the window which encourages passengers to wear masks.
After a while, the group begin chanting "resist, defy, do not comply".
Many have tweeted ridiculing the chat, which comes as the PM tightens rules on mask wearing on public transport.
Jeremy Vine tweeted: "This 'song' only has one line, but Piers Corbyn keeps forgetting it."
Another commented: "Grown adults. Well done really responsible. I know let's sing a little ditty in protest.
"Jesus wept no wonder we are where we are."
Boris Johnson announced on Saturday that face coverings would once again be mandatory in shops and on public transport after the emergence of the new Omicron Covid variant.
Mayor of London Sadiq Khan has said the Government's decision to impose tighter restrictions on face masks is "welcome".
He tweeted: "Today's announcement that face coverings will be compulsory on public transport nationwide, as they already are across TfL, is welcome.
"Evidence shows they help stop the virus spreading, and this is a measure I've repeatedly urged the Government to take."
