The dagger flies up through the hole in the ceiling, zooming towards the heat source on the other side of the room.
@TheRavenHasLanded SInce you can see through the daggers, you can see about a dozen people in military gear holding rifles, who've moved some crates into a sort of wall for cover. The dagger strikes one of them, and the grenade detonates, eliminating at least three or four. The rest leap away in surprise and fear. One needlessly fires his gun several times at the trapdoor.