Creepy oath, check. Bad music, check. Thinks he's a god, check. Turns out that supervillains existed in reality after all.
The pleasure of that thought outweighed everything else. She'd just promised not to leave. That didn't stop her from doing whatever she wanted while she was here.
"Okay," she said, and without so much as a by-your leave she turned away and went over to see Donkey Kong. May as well see what else was going on here before she started lighting fires.