Jubal spotted it and kept her from falling, Mike being far too inexperienced to cope with it.  Then Jill had to speak sharply to Mike to keep him from trembling into withdrawal when he saw what had happened to Dorcas.  Luckily Dorcas came out of it shortly and was able to reassure Mike that she was all right, that she had indeed "grown closer" and would happily grow closer again - but she needed to catch her breath. "Whew!"