Actually when you kill Truth, Johnson hops into Pelican and Gravemind CLEARLY knocks down Chief and Arby(From the Pelican).Now if he just chucked them down the pit, the game would pretty much be over.SaneIntolerant said:On Halo 3: Gravemind himself is nowhere near where Chief 'n' Arby were at that moment. The only way he was able to communicate with them was by way of the other Flood forms. From this, we could probably guess that he's stretched thin as it is, given that he's only able to talk to you directly if you're in a place that is entirely infested with Flood (Flood ship in Floodgate, High Charity in Cortana). He was also probably preoccupied with getting information from Cortana to care.
Also another thing about Halo 3: Notice how in intro Johnson mentions that Chief survived a 2km fall "only" falling into a lockdown? If that spastic can jump out of a space station and fall for 2km, why do I die everytime I fall from 15 meters!?