[Spoiler] 1st time watcher such a epic show! But genuinely confused on this last season. Many questions.

Can someone explain the bathroom scene to me? Why did she suddenly try to kill or choke out the dude she was hooking up with? It felt like if he didn't stop her she was gonna choke him out.

And what the hell is going on with the last season? Is this a dream? Is Barry tripping balls? Is he dead & it's showing us a alternate reality?