Chester's symptoms are most consistent with those seen in "catatonic schizophrenia".
Catatonic schizophrenia, uncommon serious mental issue described by striking motor conduct, normally including either critical decreases in intentional development or hyperactivity and agitation. At times, the patient may stay in a condition of relatively total fixed status, frequently accepting statuesque positions. Patients may stay still in an unbending stance for a considerable length of time or even days.