He hid as Shego screamed his name again.
She'd agreed to let him test the mind control device on her. (The new henchmen were so brainless they'd walk right off a cliff if he said so. Testing on them was pointless.) But she'd set a time limit.
Which he'd ignored in favor of telling her about his childhood inventions.
He wasn't sure what about the situation had her the most upset, but either way, as she stomped past his hiding spot he had to admit… He didn't like obedience from her.
Even if she was stubborn enough to scare him.