Board Thread:Episode Discussion/@comment-34633327-20171229202410/@comment-27143816-20180101210758

KingFubuki92 wrote: Interesting possibility I've seen raised: Weiss wasn't stabbed, Emerald is using her semblance.

Notice how while we see Nora, Ren, Yang, even Mercury's reaction to it, we don't get a glimpse of Emerald, and seeing as she already knocked Ruby out, its not like she's too busy to notice. So maybe she decided to help Cinder out by using her Semblance on Jaune, or if she is willing to risk the headache, on everyone in the room, including Weiss, so she only thinks she's in pain.

Hell, just before Cinder throws the spear, we get a small glimpse of Emerald looking in the direction of where she is aiming, but no real expression on her face. She just goes back to starring at Ruby on the ground. As if she isn't surprised by what Cinder is doing, that she knows exactly what Cinder is planning, and has no need to react as she orchastrated it.

On that note, maybe some Neo interference? I mean RT said before that Neo is returning in Volume 5 (if I'm not mistaken)