We've all been there: you're at a gig, the support act has been and gone, and there's that annoying in-between waiting period before the main act comes on.
Most people use that time to go to the bar or the toilet, but Green Day's London fans made it something very special instead.
The US rockers topped a bill at London's Hyde Park last month that included the likes of Rancid, The Stranglers and The Damned - but while the bored crowd was waiting for the headliners to take the stage, a section of the audience began singing along to Queen's 'Bohemian Rhapsody', which was playing over the tannoy. The singalong soon spread like wildfire and before long, the whole 65,000+ audience is singing the epic tune in perfect harmony.
It was captured by the band from behind the stage - and if this doesn't give you goosebumps...