As Drake walks over to Crystal, the bulge at the base of his tail shrinks slowly, the horse's mass absorbing directly into his.  Reaching Crystal, he leans down to her, whispering in her ear, too quiet for the scientists to hear, "See the door over there?"  He points with his eyes.  "See how it's a hair away from being closed?"  A small smile spreads across his face, "We could escape."