Vento Aureo - Chapter 95 
The whole group now examines the finger bones. Giorno transforms them into plants, confirming that they are effectively dead. Bucciarati opens a zipper on the plane, throwing the fridge away, to be sure they all search the plane for any suspicious sign.
Giorno sees some graffiti, which he realizes are exactly telling his thoughts, and Giorno pulls his right sleeve, revealing an extra hand which had been writing Giorno's thoughts and growing by devouring Giorno's cells. He realizes that when he examined Carne's body, his Stand was somehow still working and brought the fingers into the plane.