User blog comment:Toothless99/Things I noticed/@comment-3230751-20110108180437

I think that you answered it yourself. Gobber recognized it as a Nightfury do to the noise and fire Toothless made. His tone was one of surprise on finally discovering what a Nightfury looks like. All of the Vikings knew what Nightfury sounded like, so they identified Toothless by his sound and color. Hope I don't sound obnoxious, I really like your line of thought.