Could the OTC work in reverse?

Is it possible to push a button and allow outie consciousness into the severed floor? This could explain how Helena could be replacing Helly, logistically. Helena could become Helly in the elevator for a second, and then Helena could take back over before the elevator door opens.

I do think that “Helly”s behavior in the first episode was super weird. And she did not act like she had just been tackled by Cobel.