#is we saw exactly what spike would do if he thought the chip wasn't active anymore in smashed...

[charmedslayer]

6x09 - Smashed (Transcript)

As Spike turns her around she punches him with her other hand. He pulls back and backhands her. Buffy falls to the ground.

Spike looks surprised, puts his hand tentatively to his head with the beginning of a smile. Looks at Buffy, who is still getting to her feet and has her back to him.

SPIKE: Ahh, ahh, ohh! (grabs his head)

Buffy gets up, backhands Spike and he goes down. He gets up to a kneeling position with his back to Buffy and stays there, looking at the ground. She speaks to his back.

BUFFY: You're a thing. An evil, disgusting, thing.

She walks past him and away.

Spike lifts his head to watch her go. Slowly an evil grin spreads across his face.

[...]

Open on the street, downtown, night. People walking around, talking, etc. Spike walks out from an alley, looks around, grins.

Pan across the street. Lots of people going about their business.

SPIKE: (to himself) Look at all the goodies.

He continues looking around, pauses as he spots something.

Closer shot of a young blonde woman standing on the corner, looking at her watch, looking around, hugging herself as if she's cold. She turns and starts to walk away.

Spike moves to follow her.

Cut to an alley. The young woman walks along, still hugging herself, looking nervous. Suddenly Spike steps out in front of her. She screams.

SPIKE: That's right, you should scream.

She tries to get away but he moves to intercept her. She looks scared.

SPIKE: Creature of the night here, yeah? (indicating himself) Some people forget that.

He advances on the woman. She backs away, shaking her head fearfully, backs up against a wall.

WOMAN: Please.

SPIKE: She thinks I'm housebroken. She forgot who she's dealing with.

WOMAN: Anything you want, please-

SPIKE: Just 'cause she's confused about where she fits in, I'm supposed to be too? 'Cause I'm not. (pacing back and forth) I know what I am. I'm dangerous. I'm evil.

WOMAN: (scared) I-I'm sure you're not evil.

SPIKE: Yes, I am. I am a killer. (moves closer to her) That's what I do. I kill. And, yeah, maybe it's been a long time, but … it's not like you forget how.

He gets up very close to the woman, who is panting fearfully.

SPIKE: You just … do it. (nervously) And now I can, again, all right? So here goes.

He morphs into vamp face. The woman screams.

SPIKE: This might hurt a little.

He bends over to bite her, then flings himself back, yelling in pain, crashes into a Dumpster. The woman runs off.

Spike crouches there clutching the Dumpster, panting.

SPIKE: What the hell is going on?

I don't have the biggest BTVS reach but I have been thinking about this