There are at least four artists called Havok: (1) an American thrash metal band ; (2) a German death metal band; (3) a Swedish extreme metal band; and (4) an underground rapper.
These are photos from concerts where Havok played, so they may be of other bands that played the concert as well.
Sepultura / Death Angel / Krisiun / Havok Apr 21, 2012 Joliet, Illinois, United States Uploaded by Chris Kimpson
Havok / Psychosomatic / Mucus Membrane / D.E.G. / Descendant Aug 29, 2009 Sacramento, California, United States Uploaded by Sacramento Shows