I was recently asked advice on this subject via PM. Here's what I came back with.
'Instead of waving the hand about, try this;
At the moment immediately before the load happens, start moving the spectator, guiding her towards a more clear area, so the audience/group of spectators can see the action. Of course, the actual reason is so that they are less likely to feel the load. So the load happens while they are moving. Very strong misdirection.
Or to get the load out of the way even earlier, as you grab her hand to raise it up, load it as you raise the hand. This is also very good.'
'What you wanna do is to make contact before the loads, yes. And if you have walking space, load as you are leading them to a clearer area, apparently for better visibility for the other specs. *Big motion hides small motion* y'know?
RE: your shuttle pass. The secret is to keep it casual, while still making it quite clear whats going on, and where the coin/bill is supposed to be. I say
'Okay, so will you do me a favour? I'm going to take your coin (Shuttle pass), and your hand (Take specs hand), and all you have to do is watch very closely, and tell me if you can feel this (Load)... So you can actually feel the bill vanish right?!'
We then obviously go into the vanish
'
Hope this helps!
CL