Drogyn threatens to kill Spike for asking him a question, but shortly after, Angel asks him how far down the hole goes and Drogyn doesn't seem to mind at all.
Spike is looking down at the "hole in the World" that's the cemetery of demons. He imagines that at the antipodes a New Zealander could have the same view but reversed. But he's in England, and the antipodes of England are in open Pacific Ocean. The antipodes of New Zealand is actually southern Spain.
(at around 21 mins) When Wesley is explaining Illyria and the Deeper Well to the others, his mouth is clearly out of sync with what he's saying at one point, even to the point of continuing to "speak" after he's done talking.