Ha! If only.  I wish that was the case, but I think it's more likely she just won't come back, will probably leave a shitty 1* review online and the instructor will be given a verbal warning. Never justice when dealing with fats.  I honestly hope the guy will be okay, and that the insurance for the centre won't go up.  She's ruined someone's life for the next few months at least. And probably comfort are herself into a carb coma that night.