I agree also that having a placed positive intent prior to taking the plunge is vital.. I always do this myself (usually request/ask for a positive lesson or healing) and at the very point of sharing with another I always ask what they want from it and to plant that in their mind as a forethought.

Even the most apprehensive person soon drops back into the chair and starts to smile massively about 10 seconds after closing their eyes (followed almost always by a "WOW.. WOOOOOAH").

I have shared with a few people now and one thing I had always noticed (and do myself) is that upon getting that real good hit EVERYONE pauses for a moment, looks at their forearms, then kind of go boggle eyed.. about half of them then go back for a 2nd/3rd hit hehehe.