Clinical conditions apply in the video for Mystery Jets' Serotonin by Rhys Jones and Paul Routledge, who sat a number of young people in front of their camera somewhere in East London, and filmed the results of them exhibiting symptoms or feelings associated with the so-called happy hormone (and other things).

"Shot over the course of one night in East London, we created a studio environment which was relaxed and intimate so that the cast could feel at ease," report Rhys and Paul. "Filmed on a Canon 5D, using a stills portrait set, up we documented the participants at various intervals throughout the night."

So sort of the polar opposite of Jon Glazer's classic Nick Cave video for In Your Arms. There's still something riveting about looking at a series of faces, wondering what's going to happen...