During the clonic phase, the lips, tongue, or inside of the cheeks may be bitten. Involuntary urination or a bowel movement may occur. Immediately after the jerking ceases, the patient generally has a period of what appears to be sleep with more regular breathing. Vomiting may occur at this time. The period of sleep may be a few seconds with awakening or a few minutes. Rarely, the patient may appear not to waken at all and have a second period of rigidity followed by muscle jerking. This is known as status epileptics. Upon awakening, the individual usually is mildly confused as to what has happened and may be disoriented as to where she or he is. This period of post-seizure confusion generally lasts only for a few minutes but may persist for several hours in some patients. Headache, sleepiness, nausea, and sore muscles may persist in some individuals for a few hours. See the text box on the next page for what to do in the event of a seizure.