Because he didn't think I'd stay in the ocean if it was that easy to get me out again! I was only going to be sealed in the earth for a while, anyway, till I was... bigger. Too big to do anything but stay in the sea till it was time.

[Geir does hesitate there. "time for what?" is the next question, of course, but the reactions he's gotten to "the end of the world" have been... mixed, to say the least.]