This one is a little old. But I thought it was worth sharing. If you're familiar with the Westboro Baptist Church (Fred Phelps family), you're no doubt aware how wacky they are. Here's an interview with Shirley Phelps, in which the interviewer (Julie Banderas) shows that mainstream Evangelicals can be just as wacky.
The interview doesn't start until halfway through, but it's a thing of beauty. If you want to show an audience how crazy the subject of your interview is, you need to stay a lot more composed than Julie Banderas did. Compare with the well-known Katie Couric/Sarah Palin interviews, in which Couric is polite, civil, and inquisitive, giving Palin enough rope to hang herself. With someone this crazy it should have been even easier. All you need to do is give them a platform to speak.