"Yes, I am able," she says with Mami's voice-- by mistake. And she demonstrates by standing up. It is a slow movement, meant to not startle Mami too much. Her intent is obvious in the thoughts she lets leak through, and the thoughts she tries to hold back.

"... I'll try to let you move on your own, and to not interfere too much. Let's go and find our answers."

It's incredibly odd to try and settle back and not move while also leaving your body open to movement. Homura isn't sure how to do it so it's awkward, and Mami's body stumbles forward.