The Happy Birthday Song

Everyone knows how to sing the birthday song - "Happy birthday to you~" repeat 4 times. One variation would include changing the 3rd time to "Happy birthday to [insert name]".

In my school days, another variation went:
"Happy birthday to you,
You were born in the zoo,
With monkeys and elephants,
Happy birthday to you."

Sounds ok yeah? Not too offensive yeah?

So the other day I got to know of another version straight from the Nephew's mouth. It started the same, "Happy birthday to you". And the next line went - "You were born in the sky". I was like, wow, born in the sky? That's... nice? Sky ma, we love the sky, don't we?... though it doesn't rhyme with "you"...

The 3rd line surprisingly rhymed with "sky", but when I heard it I was quite horrified: "You will drop down and die~" .................................... and ended with "Happy birthday to you."

... Speechless.