jem shouted , and went after him , catching at the back of his coat ; will swung around and shoved jem , not very hard ; tessa heard jem say something about will having held back all these years and not wasting it now , and then it all blurred together-wil swearing , and jem yanking him backward , and will slipping on the wet ground , and the both of them going over together , a rol ing tangle of arms and legs , until they fetched up against a large rock , jem pinning will to the ground , his elbow against the other boy 's throat .