help and stop, drained into tradecraft
hearing it back behind him several steps crying a tight-echoed Stop Motherfucking Stop!, with a supine person Krause vaulted lifting a decayed head from the alley floor to counter with: Go.
Context
The chase runs on emergency language that has been fully arbitraged: pursuer and thief both scream Help! and Stop!, engineered to cancel each other so no bystander can tell victim from predator — an "ancient trade-device," rescue-words as noise-cancellation. The street's one unsolicited reply comes from a man flat on the alley floor, whose entire contribution to the exchange of human signals is: Go.