Atomo wrote:no.4 Turdnase- "if i just wave my hand over the cards in this sort of weird unatural way, (slide up, slide down, slide up again)we see the card has changed!
I've ranted elsewhere - laying into the DL - about this kind of 'odd movement only magicians do' giveaway. However, I must disagree with you when it comes to the Erdnase.
1 (And this is always my best criterion) It totally fooled/amazed me when I was a small child. My six-or-seven-year-old self wanted to think the magician had a card palmed, that he placed on top of the shown card to produce the change: but he obviously didn't - his hand was, undeniably, empty. I was flummoxed.
2 To do the Erndase as you discribe - "slide up, slide down, slide up again" - is, in my personal opinion, the mark of needing a good kicking. I know people do it like this (and people who are far,
far better card workers than one-step-above-rubbish me), but I think it's wrong and they are evil. This is how it should look: 'He's showing us the card, now, as he gently waves his hand over it, it changes' (or '... after covering it for the merest instant, his fingers jerk widely apart and - Boom! In a flash! - it's changed.' The first 'up' should be unnoticed -
unnoticeable, ideally - the next 'down' and 'up' not a staccato, putting-a-round-into-the-breech movement, but rather a casual, subtle display seeming to say, 'See? The card's still there, OK? I'm just letting you see it again to be as open as I can about this.' Which means the change and the, sole, 'magical gesture' appear to happen at the same instant and utterly out of the blue/without preparation.
Elsewhere, a little-used but - coming unexpectedly - jaw-dropping, 'That changed right in front of my eyes' change is the RRTCM's unimaginatively-titled 'The Changing Card'. (BTW, it's one of those things that, on the page, appears a bit naff and, when you know the method, you're inclined to reject out of hand because you think it'll never fly, but is actually great.)