Ask your interviewer ask many questions about what they do for work and really listen. They will walk away from the interview in a good mood since they got to talk about themselves and they will think that the interview went really well.
You know how a joke ceases to be funny when you have to repeat it? Will use that to your benefit,If that asshole in the group is making jokes at your expense, act like you can't hear him and ask him to repeat it like two or three times. By the time he is saying it for the second or third time, no one's laughing.
If you ever suspect someone is following your car take four turns in such a way that it forms a circle. If they are still behind you then they must be following you