It's one of the combo talents. You know when you combine 2 skills they might cause another effect. I'm pretty sure they were in ME2.
For instance Throw and Warp are just one of a few pairings that will cause a biotic explosion, another is Pull and Reave. You can also do tech bursts, obviously this applies to tech skills like overload and incinerate, and fiery explosions, not sure how to que that one though.