It was the betathanatine. The heart-dragging slow chill of the drug, because without it I would have been moving with the breath of air as the door opened on my flank. The thought crossed my mind as rapidly as it was able, and even as it did I knew by its very presence that I was going to be too slow. This was no time for thinking. Thought in combat was a luxury about as appropriate as a hot bath and massage. It fogged the whiplash clarity of the Khumalo's neurachem response system and I spun, just a couple of centuries too late, shard gun lifting.