People often ask why I went to school where I did. (My parents were serving where the Need was Great totally unnecessary).
"My father was trying to save the Christians from Christianity!"
This usually leads to your question.
I tell them I was brought up in a high control religious cult.
This is never enough information for anyone, so they start probing....
I tell them it was a doomsday cult who's killer God was supposed to have killed all the bad guys by now and taught that I was never going to leave school and have to earn a living before their big scary Armageddon.
Not one person has ever stopped asking questions at this point. They all want to know what religion it was.
After I tell them, I lead the conversation into a discussion of the mind control tactics of cults, shunning etc. Most people do not know of the shunning tactics employed by JWs. I doubt that many would be interested in a Babel Study with a Jaydub by the time the conversation is over.
I also have a physical defect that is a direct result of the cult influence. Asking me about that leads to a similar conversation.