she pulled the knife up and up and up jason was acting out the scene , his hand outstretched , holding an imaginary blade , shaking in the effort of pulling up through imaginary skin and bone , through his stomach , through his chest cavity , breaking out of his neck , he pulled his hand back , but immediately thrust it forward again , and she stabbed him right in the mouth , rohanna said , reclaiming the telling of the story , right in that terrible mouth that had wanted to yap and yap and yap his insults and disgusting taunts .