Nightwing tensed, but there was no way that he could have moved in time to save anybody. Instead, once Cassie had hold of Blue Beetle's arm, he moved forward into the boy's line of vision.

And, consequently, putting another body between Beetle and Brainy.

"I know it's a lot to process at the moment, but you are safe." He wasn't resorting to his 'Bat' voice yet, but that might happen soon enough if Jamie didn't calm down. "You're hurt and that's going to be fueling the adrenaline spike you've just gone through, but right now, you're safe and we're doing what we can to get you patched up, but for the moment, just listen to our voices, mine and Cassie's, all right?"