Thanks hon. Yes, when Oz left she experienced her first real heartbreak and did that 'my will be done' spell. That was like the door opening a first chink, wasn't it? On top of the boost to her self esteem from realising that, at university, she was more at home than Buffy... Hmm, yeah, you're right, that was the first overt sign of darkness ahead.
*g* Poor Giles. He really wants to be a good watcher, now that he's committed himself to it, but he's certainly not stupid and he's learning as he goes along.
Thank you hon, for the lovely comment