BOB in Ronette's Memories

In episode 8 (2.001, May The Giant Be With You), we see Ronette Pulaski's memories of the night Laura Palmer was murdered.

In Ronette's memory, BOB raises his arms above his head and strikes downwards. Initially, one might assume we're witnessing BOB attack Laura, though the script says we are meant to see through Ronette's eyes. The script describes the scene as follows:

79. INT. TRAIN NIGHT

FLASHBACK: Ronette's POV; sound and picture distorted and strange. We see what she sees.

Laura kneeling nearby on the floor of the train car.

Two surgically gloved hands frantically forming a small mound of dirt.

Blood dripping.

A hand ripping the half-heart necklace from around Laura's neck.

A finger dipped in blood, writing the note.

A hand picking up a heavy wrench and advancing towards us.

And the wrench is raised threateningly above us.

And we see him. Bob, the grey-haired man. He swings the wrench down at us.

The script is obviously different from the televised scene, though BOB is shown by the mound of dirt in Ronette's memories.

I believe the scene once contained more than we are allowed to see. Laura (Sheryl Lee) looks very much as she did in episode eight (May The Giant Be With You, 2.001) in a promotional photo that ran with a magazine article on Twin Peaks: Fire Walk With Me, indicating it is a deleted scene from the series. I believe she acts as she does because she was in that moment possessed.

Laura in the series and in a photo from Fangoria magazine. 

Frank Silva (BOB) described an action we do not witness in the season two premiere in John Thorne's The Essential Wrapped in Plastic:

Interviewer
"Someone pointed out to Mark Frost, during an interview at the time, that Robert Iger had said, "Bob is the killer," and Frost said, "Well, that's his opinion."

Frank Silva
"And there were so many theories because of that show! The freeze-frame, at the end, of me screaming where I'm digging into her with a knife -- a lot of people were reading into that, saying, "He wasn't killing her, he was trying to save her! He was giving her CPR!" Uh huh. Sure."

We don't see BOB using a knife. Viewing the scene without pausing leads one to believe we see him crouching beside Laura's body. His gaze moves away from her as he throws back his head to howl. A howl that sounds all at once like wailing, a dog's bark, and laughter.

A jump in the footage is apparent in pausing the scene. BOB's feet, legs, and hands can be seen, but as the camera moves upwards the screen goes black then BOB's face appears in a different still.

In the brightened photos below, notice how the frames move from his hand resting on his knee to BOB apparently kneeling over Laura's body. He seems to be slightly closer and out of frame in the first few stills after the shift from his hand. 

 The follow frames are repeated to indicate where I believe BOB appears in the first frame.