Remarkably the patient was telling the truth. He really did, without any analgesia, use a household electric power drill to drill through his skull (perhaps a DIY borehole?). He is believed to have a psychiatric illness.

The appearances suggest he used the 8mm drill-bit of the set. This has caused a subdural hematoma/collection with the introduction of a significant volume of air. The patient was transferred to a neurosurgical center for further management.