A professor in the middle of a lecture unbuttoned his shirt and rebuttoned it several times in rapid succession, started to sing, and then ran out of the room. He was discovered several hours later sleeping in the rain on a bench in front of the university library. He could not remember his classroom behavior, and he had no idea how he had fallen asleep in the rain. The professor may have experienced:

A complex partial seizure

Explanation:

The seizure is a complex brain problem. It is a neurological disease. If a person has seizures, needs immediate treatment. It occurs without any indication.  

Symptoms :  

Thus here the professor was suffering from a partial seizure that creates a problem for him. Even he forget what he did in the past. It affects his episodic memories.

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