"For a bit, yeah. Some stuff with explosives that needed to be taken care of." He grins. "Funny to think you were here too!"
He follows Spike's gaze but there's nothing there. It's odd how the fact he killed a Slayer here is doing more to excite him than it is to turn him off. Perhaps it's because he's mellowed a bit, or perhaps it's because she at least was someone who'd chosen to fight vampires, had gone into it with full knowledge, not just an innocent passerby.
Or perhaps it's because the image of Spike battling a hot Chinese chick in the middle of this burning, noisy conflict is really rather hot. As is what he imagines followed with Drusilla.
"Fancing a little re-enactment, then?" he asks, and rolls, heaving Spike off while he's not paying attention and springing to his feet and into a fighting stance - and only at this point noticing that he's fully dressed again, apart from his coat. Huh. Dreams, eh?