An actor prepares to receive "shocks" from the audience on a fake TV game show, staged for a French documentary. Psychologists have questioned the ethics of such experiments because of possible mental trauma suffered by participants.
Christophe Russeil, HO/AP
The house music DJ deadmau5 (pronounced "dead mouse") performs at the Ultra Music Festival, the accompanying concert event to the Winter Music Conference, in 2009. He is headlining this year at Ultra.
Drew "Rukes" Ressler/Flickr