Patrick Dolan was nearing his 18th birthday and very excited about the family tradition.
His father, grandfather and great grandfather had all been able to walk on water on their 18th birthday.
On that special day they'd all walked across the lake to the pub for their first legal drink.
On his birthday Pat and his mate Mick took a boat and rowed out to the middle of lake.
Pat stepped off the boat and nearly drowned. Mick grabbed him and and barely managed to pull him to safety.
Furious and confused Pat went to see his grandmother.
Grandma, Tis my 18th birthday so why can't I walk across the lake like my father, his father and his father before him?
.
Grandma looked deeply into his troubled eyes and said "Because they were all born in December when the lake is frozen. You were born in July you fookin idiot"!!!!!!.