One of the early SC finals - 1899 between the Winnipeg Victorias and the Montreal Victorias was marked by the Bob MacDougall - Tony Gingras Incident. Similar to the Clarke - Kharlamov incident in the 1972 Summit Series. Unfortunately there are no videotapes to look at so the written word is what remains.
One perspective, February 26, 1935, is offered by D.A. L. MacDonald in his "Turning Back Hockey's Pages" profiles featuring Bob MacDougall: