Shmuel: I wish you'd remembered the chocolate.
Bruno: Yes, I'm sorry. I know! Perhaps you can come and have supper with us sometime.
Shmuel: I can't, can I? Because of this.
[points the electric fence]
Bruno: But that's to stop the animals getting out, isn't it?
Shmuel: Animals? No, it's to stop people getting out.
Bruno: Are you not allowed out? Why? What have you done?
Shmuel: I'm a Jew.