I was just getting ready for bed when this happened, since I'm from Aus spiders dont really worry me though but its always annoying for this to happen.
This is a New Zealand White-tailed spider they aren't really harmful to adults even though they are technically the most vemonous spider in NZ. They are kinda dangerous to young / old or people with allergies but mostly just give people frights.
"White-tailed spiders wander about human dwellings (beds) and may be encountered unexpectedly" is a bit of an understatement by Wikipedia. They are hunting spiders so don't wait in webs, and have a bad habit of dropping from the ceiling. In fact about 2 months ago my friend was eating a burger on the couch, when I saw one of these directly above him ( he is terrified of spiders ) he moved to the other side of the couch, 2 minutes later we looked up and it was gone. It had dropped to were he he was sitting a moment ago, and wandering around on the cushion. Anyway, back to going to bed, sweet dreams all.