Definitions of amuck:

• adjective:   in a murderous frenzy as if possessed by a demon

  Example: "The soldier was completely amuck"

• adverb:   in a murderous frenzy

  Example: "Rioters running amuck and throwing sticks and bottles and stones"

• adverb:   wildly; without self-control

  Example: "When the restaurant caught fire the patrons ran amuck, blocking the exit"