This is a joke,

Chrissy and Barbie, two sisters had promised their uncle, who had been a seafaring gentleman all his life, to bury him at sea when he died.
Of course, in due time, he did pass away and the two s kept their promise. They set off from Clearwater Beach with their uncle all stitched up in a burial bag and loaded onto their rowboat.
After a while Chrissy says, 'Do you think we're out far enough,Barbie?' Barbie slipped over the side and finding the water only knee deep said, 'nope, not yet Chrissy'. So they row a little farther....
Again Chrissy asks Barbie, 'Do you think we're out far enough now?
Once again Barbie slips over the side and almost immediately says, 'No, this will never do, the water is only up to my chest.'
So on they row and row and row, and finally Barbie slips over the side and disappears. Quite a bit of time goes by and poor Chrissy is really getting worried when suddenly Barbie breaks the surface gasping for breath.
Well is it deep enough yet, Sis?'
'Yes, finally. Hand me the shovel.'