Originally posted by Anarky:

The big rim coming closer wasn't a larger clue?

Alas, this isn't the Disc and we are not Rincewind. There's no spell that will teleport us back onto dry land.

I would be interested to see if there is a turtle over the edge though.

*falls off edge of the world and awakens naked in bed*

"...Did you get the number of that donkey cart?"