A 17-year-old student fromSt. Charles (Ill.) North High School has been seriously injured in a stunt that was part of a unsanctiooned school scavenger hunt. Erik Nava of South Elgin, Ill., was hospitalized in serious condition after he apparently jumped from a sport utility vehicle moving at 25 miles an hour. As many as 200 students were taking part in the scavenger hunt, police say. To read The Chicago Sun-Times article, click here.