A Patty Hearst is the event in which you get an erection at an awkward time.
"Hey bro, I was talking with the retarded security guard at the bank today and I got a Patty Hearst."
Inheritor of the multi-millionare Hearst(publishing company)fortune, Patty is mainly known for her 18-month kidnapping by the Symbionese Liberation Army in 1974. While kidnapped, she was often bound and held in a very small, dark area. When not bound she was brainwashed by her kidnappers into thinking she was one of them and went on to "officialy" become a member and assist in robbing a bank. After she was rescued she went to trial and sided with her kidnappers, as well as admitting to doing Marijuana and insulting her parents. This landed her in almost two years of jail, mainly for robbing a bank, but she was commuted by President Jimmy Carter and later pardoned by President Bill Clinton so she could write a book about her travels with the SLA.
Although I understand that being brainwashed will affect your way of thinking, there is no possible way to not know that you are doing a bad deed when robbing a bank. I mean come on. Patty Hearst you're not fooling anyone.