In1974-1975 Dave “the Hammer” Schultz topped his mark from the previous season by setting an NHL record for penalty minutes (472 in all).
As the Bullies had put intimidation to good use the past three years, the Flyers' rugged style of play led the Soviets to leave the ice midway through the first period, protesting a hit on Valeri Kharlamov, whom Clarke had slashed on the ankle in the famous Summmit Series of 1972, by Ed Van Impe. After some delay, the Soviets returned after they were warned that they would lose their salary for the entire series. The Flyers went on to win the game rather easily, 4–1, and were the only team to defeat the Red Army outright in the series. After this win the Spectrum was known as the "most intimidating building to play in and has the most intimidating fans.
The highlight of the 1974-1975 season had no bearing on the season standings. On January 11 at the Spectrum, the Flyers played a memorable exhibition game against the Soviet Union's dominant Central Red Army team.
