Raucous off-campus parties and the excessive noise and public drunkenness associated with them can also create town–gown animosity. The University of Colorado (Boulder, Colorado, USA) and Queen's University (Kingston, Canada) provide examples where street parties have escalated into riots. In 1995, at Wilfrid Laurier University in sedate Waterloo, Ontario, the "Ezra Street riot" occurred when 1500 revellers showed up at an end-of-the-year student party on Ezra Street. The party goers drank copious amounts of beer, threw bottles, and carried on in ways that resulted in 42 arrests and two serious injuries – one when a woman was hit by a chunk of concrete thrown at the party, the other when a man was run over by a jeep. The end result was the university's adoption of a new "Code of Conduct" to govern student behaviour.