AA / fear is a self-defence mechanism. The theory is that because it had evolutionary advantages for most of the time humans have been evolving it's become very pronounced (like a peacocks tail). But in 2014 in a night club it's totally fucking useless. So you have to ignore it and act anyway. All the rest is your mind trying to rationalise logically why you're feeling it. Because you think it's real and must be there for a reason.