Lennie went to the bush where George told him to go and wait if he ever got in trouble again. George later on finds him there. Lennie is worried about George being made at him for doing a bad thing
Lennie confess about doing a bad thing and how he don't want George mad at him. George tell's Lennie that he was never mad at him. Lennie ask George to tell the story about how they are different them the other guys. George asks Lennie to look at the river while he does then George takes the gun and shoots Lennie in the head.
The guy's hear the gun shot and come running. The men assume that Lennie shot himself. Slim goes to George and sat beside and told him " Never you mind…A guy got to sometimes."