That's not very professional, anotherthing. you have people thinking that controllers can't hold their beer - and in my experience that's not at all the case.
More seriously, I think I would try to find out what it is that makes your audience nervous - or maybe you can draw up a list yourself - and then take them through a flight much as Scooby suggests focusing on those areas that the layperson may be nervous about but is likely to have little knowledge of. I think psychologists have a name for making people accept/or talk about their fears - I'm not suggesting that you take on the role of psychologist but unless you know what frightens someone it is difficult to know what to try and help them with.