After leaving Apple, Smith descended into schizophrenia.
He lived in a house down the street from Hertzfeld, and as his disorder progressed he began wandering the streets naked,
at other times smashing the windows of cars and churches.
He was put on strong medication, but it proved difficult to calibrate.
At one point when his demons returned, he began going over to the Jobs house in the evenings,
throwing rocks through the windows, leaving rambling letters, and once tossing a firecracker into the house.
He was arrested, but the case was dropped when he went for more treatment.
"Burrell was so funny and naive, and then one April day he suddenly snapped," Jobs recalled. "It was the weirdest, saddest thing."
Jobs was sympathetic, and often asked Hertzfeld what more he could do to help.
At one point Smith was thrown in jail and refused to identify himself.
When Hertzfeld found out, three days later, he called Jobs and asked for assistance in getting him released.
Jobs did help, but he surprised Hertzfeld with a question:
"If something similar happened to me, would you take as good care of me as you do Burrell?"