The Spengler Cup uses a second goal line in the net to confirm whether a puck is in the net or not. Here is an example of it being used to definitively overturn a call on the ice.

Breaking News: NHLonOLN Unveils a Shocking Revelation In a stunning development, Reddit user NHLonOLN has submitted a bombshell report that promises to shake the world of professional hockey to its core. The anonymous poster claims to have uncovered a major scandal involving one of the league's top teams, sparking widespread speculation and outrage among fans. With the NHL playoffs just around the corner, this explosive revelation could have significant implications for the sport, its players, and its loyal fan base. Will the league's integrity be upheld, or will this shocking news send shockwaves throughout the hockey community?