Some hypnotists... aren't as bright as they may seem, like the stage hypnotist at the show Christie went to last night. While hypnotized, he told her from now on, she would believe you're supposed to drive with your feet. You'd think someone who could influence people's minds so well would be smarter than to give such a dangerous post-hypnotic suggestion!
Now, in the car and about to leave after the show, Christie's sister is arguing with her and trying to get her to put her feet away. The problem is that Christie was so suggestible her mind was now convinced this was how you drive.
Maybe Christie's sister can stop her for long enough until the hypnotist walks out to his car. He's her only hope... even though this is all his fault in the first place!