"I don't know what that is," B points out. "You're lucky I know what a clarinet is, actually." Some of the instruments on those buttons he doesn't recognize (what the hell is a "fantasy"?), in fact. But he does settle in and try another couple set of chords, carefully. His hand still isn't all the way healed.

Then he starts on an only slightly slowed-down rendition of Oh Johnny Oh. Somebody remembered a song from before HYDRA, it seems.