Topher tenses imperceptibly. The fact that he involuntarily gives a physical response to an emotion while in the dreaming is in itself a bit of giveaway, really. On top of that, the surroundings seem to darken a little.

"He's not a god," he answers seriously, letting the juice box disappear. For a moment he contemplated just pretending he doesn't know him, but chances are he'll have an easier time convincing Johnny not to tell Gabe he met Topher than hope it just won't come up at some point.