There's some universal sign language for that...

Neil Finn had to backtrack quickly during Crowded House's set at Hyde Park Calling.

He harangued a bloke he saw on the corner of the stage:

"Where has your friend gone? Are you here as a decoy to make sure no one storms the stage, because you have done it already?"

That doesn't even remotely make sense anyway. But to make it worse, he was actually slagging off the man with the thankless task of translating Crowded House lyrics into sign language.

Oops.

To be fair, when he realised what he'd done, he did apologise. Apparently he was short tempered after having to throw out a load of bloody labradors some idiot had allowed in backstage.