The first chord had only made the way safe. The second one, however, shifted the ground under their feet. Erik was unfazed by the movement, having long ago grown used to it. But he nevertheless waited until he was certain the man behind him had adjusted to the jolts and starts as his automation moved their path more firmly downward.
"Oh, indeed?" Erik inquired mildly. "By all means, good doctor..." His invitation was somewhat playful, and the tone decidedly held a smirk. It was far different from the voice that had spoken about his past, earlier. Part of his amusement came from the acknowledgment that the young man had just killed in his Opera House (and what a reversal, to not be the one responsible for the termination of life, in these dark walls), but more of it was from the fact that they were carrying a body and talking about how alike they just might be.
Erik was smiling in the darkness, now, as they took the steeply sloping floor down more swiftly. Their steps and turns were mirroring the second chord of the chord progression, now, those same notes that Hannibal had last keyed. The next set of traps was close.