Original: 1992 - Riot of Rostock-Lichtenhagen , Rostock , Germany - Heaviest xenophobious riots in Germany after World War II 1993 - Russian constitutional crisis of 1993 riots , Moscow , Russia 1993 - 18 May Riot , May .
Simplified: 1993 - Russian constitutional crisis of 1993 riots , Moscow , Russia 1994 - Stanley Cup Riot , Vancouver , British Columbia , Canada , June 13 , 1994 .