Jack stabs at Ralph. (PG 177) "Jack made a rush and stabbed at Ralph's chest with his spear".
The spear fight turns into a fist fight. (PG 179) "Their spears were taken from them, Jack swung his fist at Ralph and caught him in the ear"
A boulder gets rolled at Ralph, but it hits Piggy, sending him off the cliff to his death. (PG 181) "His head opened and stuff came out and turned red, Piggy's arms and legs twitched a bit, like a pig after it has been killed"