Jason was worried about this subdued grumbling nature of Zolly's that as yet had not been present.  Either this was the real Zoltan and the happy go lucky man he had first met had been a fake or Zolly was extremely upset about what he had seen and didn't want to talk about it.  Or maybe he was upset about another situation altogether.  What ever the case was Jason hoped Zolly got it all worked out before they were all out in the middle of the ocean on a ship that everyday grew smaller and smaller despite the fact it was the same size as when they first boarded it.