For a few minutes, until I read the comments, I thought this was like a parody of a poster for something I'm not aware of. Mostly because I didn't figure out what Sweetie Belle was doing and (thus) how the bubble was floating.
But will this make Diamond Tiara realize she's being wrongfully cruel to others, or that being means to others has consequences, or will this merely make her feel like the victim (since she thinks those she teases deserve it or are of a 'lower quality of pony' than her and thus it's not really being mean to hurt THEIR feelings), make her feel self righteous and thus become even MORE vicious?
Me my dream was Apple Bloom going all Chuck Norris on both them kicking their heads off their shoulders. Yeah what I was thinking too, but Applejack says that not the way get out your anger. Also Karma got them at the party.