it's from an episode of a cartoon based on the classic 1994 film, "The Mask", starring jim carrey and camron dias. in the episode, the mask of loki splits in half, and stanley becomes half stanley and half mask, with both of their conciousness active simultaniously. the two have to learn to work together to stop a former school bully wearing the other half (i think there was an episode of jackie chan adventures based on this). anyways, the back-and-forth between the two kinda reminds me of harvey dent; especially since the sinister half is on the left side. either way, the mask is smmmmMMMOKIN'!
NOBODY STOP HIM!