Remembering a near-death experience on frozen Lake Michigan. It was Super Bowl Sunday of 1984, and the carefree 15-year-old girls wanted to find ice caves. Karen Gros and Bobbi Boos, students at the Leelanau School north of Glen Arbor, walked onto frozen Sleeping Bear Bay in search of tunnels and mammoth formations they expected to find on Lake Michigan. The girls suddenly found themselves on a chunk of ice that broke off from the pack and began floating away from the shore. Suddenly, the ice on which they stood began to disintegrate into smaller chunks.