How do you get the snowman body in the Nintendo 64?

The snowman's body won't stop rolling until either he goes off the edge or until he hits the snowman's head. If he goes off the edge, you can go back up to the start and try again. If he hits the snowman's head, then you can stand in front of the (now) completed snowman and get a star.

(Note:It helps to slide down and get the snowman's head between yourself and the body)