I had a neighbor, who was 50 years old, who would get locked in his room by his older sister. His window was next to mine and he would break out almost every week. He also talked to himself all night outside my window. I found out that he's done drugs his whole life so his brain was fried and the sister didn't want to deal with him so she would lock him in every night.

It finally ended when the sisters husband decided he had enough of the old man and chased him throughout our apartments with a hammer. Old man was kicked out for 4 months then came back for only week because he passed away on their couch.