If he really wanted the exam to be rescheduled, the dumbest thing he could do is either break his own arm or pull the fire alarm somehow, or throw some stink bombs everywhere in the classroom. Those along probably will only cause suspension and minor criminal charge at worst. Though he'd be very careful with fire alarm...Now he probably can't get back to Harvard, after several years of stressful preparation to get into Harvard...
And for most jobs out there grades do matter, especially if you plan to go to graduate school.