Tommy had long heard the stories of an amazing family tradition.

It seems that his father, grandfather and great-grandfather had all been able to walk on water on their 18th birthday. On that special day, they'd each walked across the lake to the pub on the far side for their first legal drink.

So, when Tommy's 18th birthday came around, he and his pal Mick, took a boat out to the middle of the lake, Tommy, stepped out of the boat and nearly drowned! Mick just barely managed to pull him to safety.

Furious and confused, Tommy went to see his grandmother. 'Nana,' he asked, "Tis me 18th birthday, so why can't I walk 'cross the lake like me father, his father, and his father before him?"

His Nana looked deeply into Tommy's troubled brown eyes and said, "Because yer father, yer grandfather and yer great-grandfather were all born in December, when the lake is frozen, and you were born in August, ya eejit!"