It happened this month in Cope Park in Juneau, Alaska. Riley John, 14, and Seth Garrin, 16, were wandering through the park when they saw 5-year-old Mason Varner tumble off a cliff into a frigid river below. He hit his head on a rock and was being carried away the current. "I was like, 'Oh my God, that's a really far drop,'" says Riley. As fast as he could, Riley jumped into the river and swam after Mason.

He grabbed Mason's water-soaked clothes and pulled him to a safer part of the river, and when he could no longer hold Mason, he passed him off to Seth, who ran the 5-year-old to paramedics.  The teens left before Mason's mother could thank them, but she later found them on social media and they were honored at their high school with a Governor's Citation.