amuck

3. run/go amuck,
   1. to rush about in a murderous frenzy: The maniac ran amuck in the crowd, shooting at random.
   2. to rush about wildly; lose self-control: When the nightclub caught fire the patrons ran amuck, blocking the exits.

17c., variant of amok; treated as a muck by Dryden, Byron, etc., and defended by Fowler, who considered amok didacticism.