[Audio: English; Transcription: below]
Actually the full quote is
When it gets down to having to use violence, then you are playing the system’s game. The establishment will irritate you: pull your beard, flick your face to make you fight. Because once they’ve got you violent, then they know how to handle you. The only thing they don’t know how to handle is non-violence and humour.
(The clip stops just before the last sentence.)
You just know John Lennon would have been there at Zucotti park…