"No one's locking you up," he said firmly. His tone lightened. "Besides, how could they? You'd just vibrate through without a trace." And without blowing things up. Sheesh. He really needed to get the hang of that.
Wally sat down again, pulling the cookies toward himself, three of them were gone, and he was speaking through a mouthful of the fourth and waving a fifth Bart's direction. "Okay, now that I'm up to speed, just means even more you're not registering. They'll probably put you in a room and try to demand all the future secrets from you. See? I thought of that, also. Even without knowing you're related to a time traveling mani-uh..." He stopped, looking at Bart. Was it cool to berate his grandparent in front of him? It probably wasn't.
Not to mention he was pretty confused on some things. But he had a gut feeling, and he looked pointedly at Bart. "There... is stuff you can't say even to me to clarify how all this happened, isn't there." Okay, so Wally had really known that before, but not said. He'd been careful not to ask and press. Now the feeling was stronger than ever. Bart had managed to keep his heritage secret for so long, even from Barry. If he could keep that quiet, that meant he could keep other things quiet.