system
Given the following post, respond as if you're commenting on Reddit:
human
[Ferris Buellers Day Off] why did Jeanie shout “I knew it!” when finding the dummy in the bed when Ferris revealed to her at the beginning he was faking (by winking)?
gpt
The wink wasnt a confirmation of his faking sick... it was a taunt more than anything.

Regardless, Ferris' antics about the city and not actually staying at home might be more the 'AH-HA!" moment she was wanting to confirm.