@Ryanx: It is either a relic or empyrean aftermath proc on top of a set bonus that multiplies damage, most likely by 1.95-2.0, and it is all on top of a critical hit with proper atmas, so you can think of this like ~750 damage (x2 crit) (x2 relic/empyrean) (x2 set bonus) = ~6000.
You have to add more info to your pic. I have no idea what i'm looking at other then the damage. What weapon are you using. What job is this on? Basically what are you trying to show everyone?