Hehe, I guess that's where we differ then.
Although I wouldn't say exclusively that different effects get different reactions in the sense the tricks themselves do - it's the performer and I'm sure you're the kind of person to agree to this - though I know what you mean.
It might not be a realistic goal in every situation, you're quite right - every audience is different and we can't expect everyone to react or think the same.
What you say about people having their guard up I think is a great way of saying it, what I would say here is the importance of making a connection with the spectator so that they feel comfortable with letting their guard down; make sense?
Of course, not everyone is going to let their guard down and this is something we just have to accept. Not everyone is going to be running away screaming - everyone is different and thinks differently. It's an important aspect for the performer to take into consideration which effects would be appropriate for the spectator.
Can I just say that I've been enjoying this discussion though, Squ!rrel .
- Sean