he made his way down to the hard-caverns , hastening his movements into a continuous flow that was not nearly as undignified as the oddly exciting mixture of wavering and rushing that marked the emotional curve-along , or as amusing as the stolid weight-shift of the parental - ( he had the keen thought-image of tritt clumping in pursuit of the baby-rational , who , of course , was almost as slippery , at his age , as an emotional , and of dua having to block the baby and bring him back , and of tritt cluckingly undecided whether to shake the small life-object or enfold him with his substance .