I’m with you. She’s seen how 0bongo always keeps them waiting and figures what’s good for him must be good for her too.
She’s probably also seen films of Hitler speaking in public. He would be on stage, standing with his arms crossed, or going over his notes, and keep waiting after the audience is all in, and keep waiting some more, and then finally, when their anticipation had hit a peak, he started speaking. I wouldn’t be surprised if that’s part of the playbook.