when keamy and his men get back on the boat and someone asked them what happened, keamy says sometihng about the black smoke and i was sidetracked and missed what he said, but i thought it was like a mini explanation on what it was. anyone catch that?

I think he said something about a pillar of smoke about 50 feet high. I could be wrong though. :)

He said it was, "a black pillar of smoke, it tossed him 50 ft in the air... ripped his guts out."

IMO, he said it pretty nonchalantly for someone who's, presumably, never experienced anything like that.

I don't think Keamy has any emotions to display, no matter what he just experienced.
He's cold!

He's a trained killer, he's conditioned to feel anger in the face of danger and in the place of fear.