http://www.hockey-reference.com/boxscores/199303290NJD.html
Devils vs. Sharks, March 29th, 1993.
Stephane Richer scored a natural hat trick, Chris Terreri had the shutout. All five goals were scored in the second period, and of course I was in the upper bowl behind the net the Devils shot at in the first and third periods. The Sharks were in their second season, terrible, and in the midst of something like a 13 game road losing streak. This was their 10th road loss in a row apparently.
I've been to hundreds of games since, and have yet to see a second Devils hat trick in person.