The leaf on the Green Thumb Ring started to glow with a dim green light, and Harry could feel the ring getting colder. As it glowed, the plant slowly turned to look at him and visibly relaxed. It sat(? It's hard to tell with the tendril-like roots for feet) down with a thump, slightly swaying as if to some unheard music.

Behind the plant, Harry could see that Ronnie had struck a one-legged pose, bent over with his arms over his head, unmoving and noiseless except for his occasional trembles and wimpers.

From above, Harry heard his grandfather cry down, "I say, are you quite okay, Harry? What's going on down there?" He apparently couldn't see the gigantic plant now swaying on the ground.