Based on the context and the answer, generate a question. 

Context: The strange process of expulsion resumed , the hill peaking high with a pulsing movement and the skin tearing open . Rin could only hover in sympathetic agony while Manji bit down on a peeled stick and dug his fingers into the gravel . Again the emergence stopped and the rent began to heal , though the protrusion did n't retreat .

Answer:

Biting a stick was a way to forget the pain being felt .



What is the reason Manji bit down on a peeled stick ?