Before their home opener for the 1995-96 season, Florida Panthers forward Scott Mellanby saw a rat inside the team locker room and flung it against a wall, killing it immediately. That night, with the same stick he used to kill the rat, Mellanby scored twice as the Panthers beat the Calgary Flames 4-3. The pair of goals and dead rodent became what is now known as "The Rat Trick."
From there, the legend of the rat took off through the Panthers' run to the Stanley Cup Final against the Colorado Avalanche. Fans picked up on the story and began throwing plastic rats onto the Miami Arena ice.
Here's Ray Sheppard helping to give you a visual reminder: