Fina walked closely enough to continue her weak pursuing, when he got to the elevator that's when she slipped in. Using her right hand she waited for the elevator to close and start moving. When it was at a point where the floor was at a spot where it would be unlucky for them to stop the elevator, she did so and stared right back at him.
She had nothing to say, but she had the same powers he did and she could definitely stop a small elevator from working for a few moments.
If he wanted to continue seeing her tear-filled face, then he had all the time in the world because she wasn't going anywhere for now.