Fun and frolics in Greenwich Park last weekend, in a kind of flash-mob stylee.
It's the latest stunt by 'This is a knife' (or thisisaknife as they irritatingly like to call themselves) 'who bring you the internet week in compact form, in a show only available on the web'. Channel 4 (or '4' as they irritatingly like to call themselves) are behind the show, which you can download here.