Needless to say, she was letting that happen again, although I don't understand why she couldn't just throw that thing into the tree instead of carrying it into the depths.
My laptop behaved long enough to let me watch the last act on Hulu. What happened was, The Hidden One broke the containment unit thingie into pieces. Abbie held the pieces in her hands tightly enough that they drew the rest of the energy out of Jenny, but evidently she couldn't risk letting go, or the energy would be freed again. Presumably, even if she let go to throw the pieces, that split second would be enough to release the energy. So she had to keep a tight hold on the fragments all the way in.
The way this whole thing played out I'm thinking we're going to get some kind of a reset. Pretty much everybody except Ichabod appears to be dead.
Joe seemed to be still moving. Ichabod said "Oh my God" over an unmoving Jenny, though, which is inconclusive, but not promising.
I didn't see what happened to Pandora or The Hidden One, though.
Fortunately, we didn't see Betsy Ross either. I'm glad they didn't shoehorn her into the Paul Revere flashbacks. Although... oh, dear... could it be that Abbie will meet her in the Underworld and somehow bring Betsy back with her to the present-day land of the living? Sure, that would be Katrina all over again, but Abbie sacrificing herself and ending up in the realm of the dead has been done before too.