Bart was given a look that over the coming months would become quite familiar to the boy. It was one part frustration, two parts curiousity and as time passed it would come to contain three parts pride. "When we're in uniform just call me Flash, Okay son?"
Barry could have stopped Bart from flicking the signal on and off and on again but he reasoned some lessons were best taught by others. In this case it was to be Batman and Bruce didn't disappoint.
Instinctively he raised a hand slightly in Bart's direction, a warning to the lad to at least try and stay quiet while Flash explained the situation to Batman.
But if this boy was Barry's grandson (and he was beginning to believe it more and more) then there was only so far he'd let Bruce go in his intimidation of Kid Flash. Paternal instincts? Maybe.
"That's enough." He zipped behind Batman and tapped him on the shoulder. "I set the signal, not him."
"We need your help. Kid Flash here is claiming to be my grandson." He gave Bart a small nod. "I believe him, but we need to be sure."