The Los Angeles Kings had finished the 1989-90 regular season with 75 points, good enough for fourth in the Smythe Division. Their opponents in the opening round of the playoffs would the Calgary Flames. Although the Flames were minus Lanny MacDonald, who had retired the previous summer, they were still the defending Stanley Cup championships and were 24 points better than the Kings that season.
The Kings, though, were not daunted. To everyone's surprise, they held a 3-2 series lead against the defending champions with a chance to close out the series on home ice.
A year earlier, the Kings were swept in four straight by the Flames in the division final. This time, the Kings were determined to oust the defending champs for a second-straight year (they had eliminated the Edmonton Oilers in seven games in 1988-89).
The Kings and Flames had battled it out in Game 6 and were headed to overtime tied 3-3. After nothing was settled in the first overtime session, forward Mike Krushelnyski scored a bizarre goal while lying on the ice. Krushelnyski batted the puck and sailed over the head of a sprawled Mike Vernon and into the net.
The defending Stanley Cup champions were no more and Calgary head coach Terry Crisp was fired only days later, despite his team's success just a year earlier.
As great as it was for the Los Angeles Kings to eliminate the Cup championships for two straight seasons, they also had to deal with the dubious distinction of being swept by the eventual Cup winners in both of those years as the Oilers made short work of the Kings in the next round before defeating the Boston Bruins for their fifth Cup in seven years.
Nonetheless, this was an uplifting playoff victory for the Kings and capped off one of the greater playoff upsets in team history.