Here's my nominee for one of the three worst...New Hampshire 7, North Dakota 4, December 29, 2007.
UND had a 2-0 lead early in the 2nd and a 3-1 lead about midway thru the 2nd. UNH scored to make it 3-2 UND going into the 3rd, then the wheels fell off. UNH scores 5 goals, two of them ENG, to UND's 1 goal, to win 7-4. Worst third period of hockey I've seen at REA.
http://www.uscho.com/box/mens-hockey/2007/12/29/new-hampshire-vs-north-dakota/