I think Sarah Palmer is still living in purgatory - as she has been for however many years. She missed out on her daughter's anguish & husbands betrayal as she was doped up. No-one knows what state she's in (whether she actually chewed the head off the trucker) or whether she hopes she can intervene a bit more now...
Maybe Sarah is just an ordinary mortal suffering her losses - but dreaming that she gets vengeance sometimes?Killing Truck You was a daydream or envisioned in her head? That could very well be. How do you interpret her face transposed onto Jumping Man's? Figurative?
Edit: or she possibly dreamed the entire trip to the bar. Got it after a reread.
I'm really not sure - I just think she could almost be a red herring - a tragic consequence from series 2. She's probably living in a semi-delusional world wanting to kill everybody. I think I would be.
And I still don't understand the white horse that she would always see after Leland drugged her.
It seems like the tulpas in this are made from DNA plus a "seed." I'm assuming dopplegangers are the dark halves that exist in the black lodge. I'm still wondering if because Sarah was able to remove her face in the same way Laura did if she isn't a doppleganger? I don't even know how that would happen though, she'd have to go to the lodge? I don't think anyone would make a tulpa Sarah.
Unless she's always already been one. Not sure how long someone can deal with her husband drugging her nightly so that he can climb up the trellis to their 12-18yo daughter's window in order to commit rape/incest. For as intelligent as Sarah is, that's a stretch.
Only the gifted and the damned can see the true face of BOB