had fun with this one, and yeh, it seems so, altough :
she might've not killed her but maybe she did something, and hanbaru met an oddity and got posessed, and for some wicked reason, maybe in her little stupid head, she tried to protect Senjougahara by attacking him, sho is "investigating" her past
but l got a bit out of it, positively, that Senjougahara
aproached him not to help him get up but to give him what he forgot
, l was like OMG EPIX !!!!
Shinbo stays true to himself by overloading the viewer with information, once again.
l think so too.
Edit: Hachikuji's stuttering problem is amusing, as always. 
l dunno what to think about that, she seems to do it both intentionally and non-intentionally, but it's a sort of ~moe ;]
Editx:added spolier ;]