The Spirit is only half listening - it's occurred to him that if he leaves now, he might finally be able to ditch the mimikyu - but that's enough for him to pick up on odd phrases and tones. Odd phrases like 'zone out' (what's that referencing, he doesn't remember Jonouchi being particularly prone to..?) and odd tones like 'inside joke' (....??).

The Ring-Spirit decides to put his ongoing mimikyu problems on hold, and instead eyes Jonouchi with mild suspicion. "You 'zone out' frequently...?" More information needed to even attempt processing. Explain yourself, possible-doppelganger.