Shii-Dai had not expected the Imperial to move that fast, or see where he was, but he was still ready. His vampiric mind had a faster decision making process than most humanoids, so by the time he had been knocked against the tree, he was perfectly balanced and leaped back at the moment his head struck it, creating the illusion that he had been knocked out.
He didn't care that Lucian had gotten away. He knew that one of his fellow Speakers would send their Silencer to take care of him. He got up and looked at his compass, trying to decide which sanctuary was closest. Cheydinhal had one, he knew, though he had only been there once. Murmuring another spell, this time a low strength Chameleon, he ran off toward Cheydinhal.