Mistakes weren't really an option for either the Edmonton Oilers or Calgary Flames when facing elimination in nip and tuck opening rounds of the Stanley Cup Playoffs.
So the provincial rivals decided to get them all out of their systems Wednesday in Game 1 of the first Battle of Alberta staged in the postseason in 31 years.
Despite coughing up leads of as many as four goals, Calgary recovered to beat the Oilers 9-6 in one of the wildest games in the recent playoff memory — and the highest-scoring postseason game in the history of the rivalry.