Yeah, it's true. Little bones would fly out of the fan. Gamenguru and I killed each other many a time on both of those stages. Good times!
Also, the Sega CD sequel to EC is the only one to play. Additional Overkills were added to every stage too, so there were two ways to go. On Trident's stage there was one where fish would jump out of the water and devour the opponent, and another where a vine would grow out of the water and choke the poor little fella.