Recall what happens when Forrest realizes he is going to lose his first chess game to Sam.

In Chapter 15, Forrest realizes he is about to lose his first chess game to same so he uses the excuse of having to pee to step away. He gathers Fritch, Grurck, and Sam to flee, but they are surrounded. They are spared however, when the pygmies attack and Sam and his tribe are readied for the cauldron.