Bored stiff: Student yawned so hard during lecture that she couldn't close her mouth

Bored stiff: Student yawned so hard during lecture that she couldn't close her mouth Mail Online "But one teenager yawned so deeply during a class on the topic that her mouth got stuck wide open and she had to be taken to hospital. Holly Thompson, 17, was studying for her government and politics A-level at the Northampton School for Girls when she dislocated her jaw and found herself unable to close it again."