Milbury gained notoriety for what occurred following a 4–3 Bruins victory over the New York Rangers at Madison Square Garden on December 23, 1979. During an on-ice fray between the players from both sides, a Rangers fan cut Stan Jonathan's face with a rolled-up program and grabbed his hockey stick. Terry O'Reilly climbed over the Plexiglas and went into the stands in pursuit of the offender, followed by Peter McNab and other teammates. Milbury, who had actually reached the visitors locker room when his teammates started going into the stands, raced back to join his colleagues in the brawl. He caught the unruly spectator, removed one of his shoes and, while holding the heel end, slapped him hard once with the sole side before being restrained. Subsequently, NHL president John Ziegler suspended O'Reilly for eight games and McNab and Milbury for six, with each being fined $500. This incident also resulted in the installation of higher glass panels enclosing rinks in hockey arenas.