Grand mal seizures also called generalized tonic clonic seizures are the most common and best known type of generalized seizure
. Usually, they begin with stiffening of the limbs (the tonic phase), followed by jerking of the limbs and face (the clonic phase). During the tonic phase, breathing may decrease or cease altogether, producing cyanosis (blueing) of the lips, nail beds, and face. You can see the diagram in this link: http://www.epilepsyfoundation.