Amazing family tradition:

Isaac Ole had heard from his grandma stories of an amazing family tradition in his family. It seems that his father, grandfather and great-grandfather had all been able to walk on water on their 21st birthday. On that day, they'd walk across the lake to the boat club for their first legal drink. So when Isaac’s 21st birthday came around, he and his pal Sven took a boat out to the middle of the lake. Ole stepped out of the boat and nearly drowned! Sven just managed to pull him to safety. Furious and confused, Ole went to see his grandmother. "Grandma," he asked," it's my 21st birthday, so why can't I walk across the lake like my father, his father, and his father before him?" Granny looked into Ole's eyes with a broad smile and said, "Because your father, grandfather and great-grandfather were born in January when the lake is frozen and you were born in hot July!"