Anything to say to people that ask what if i chose a different one?like in the trick Hypnotic Choice?

I have a same sort of responses with Killer B.

What I do is just say that it wouldn't have worked if they chose a different card. Guaranteed: they will ask you to do the trick again. In that case I just say, "But you now know which one is red (or blue depending on how you do it)." You now have the perfect reason not to do the trick again, and they shouldn't bother you anymore.

I have never ever had any problems with this approach. I hope it works for you.

say that you knew they wouldnt

Get Sankey's Secret Files, he has a routine designed for that situation.

You could say, "Resistance is futile," then perform Resistance is Futile.

Robert V Frazier

you say then it would have been a diffrent trick all together

You can always use this one:

Spectator: "What if I chose the other one?"

Magician: "I don't know."

how about:

'What if I chose the other one?'

'You couldn't have: that would have required free will.'

jeffceth

"Then the cat in the box would have died."

(Admittedly, this only works with people who have a handle on quantum physics.)

Does that refer to Schrödinger's cat paradox where one can create an immortal cat, that is to say that it is neither alive nor dead?

The cat isn't immortal; it is simply fluctuating between life and death (in a way its alive and dead at the same time), and when someone opens the box and views the cat it forces it to settle into life or death.

Dont worry, quantum physics gets a lot stranger than this

About the "but what if I chose the other one," I highly reccomend the sankey work. The effect is that you write a prediction of a card (i think? havent watched that one in ages) on a piece of paper, and you get the prediction right; taking your prediction and crumpling it up . You talk about how people always ask "what if" and you ask them to select another card. You then have them open up the paper and the prediction has changed to their second card.

The only problem with this is if you perform it for people you perform for regularly. They tend to ask to see other tricks like killer b done again, and you dont have an easy out.

Hmm... thanks you guys, all this info about Schrodinger and his cat paradox gave me an idea for an answer to that question that fits my personality which is: "If I knew that, I would have had already completely figured out the entire theory to the quantum mechanic indeterminacy and I wouldn't be here showing you this trick."

Yeah, the Sankey routine works well for that. Also, you might want to do something that doesn't allow them to pick another card. Try forcing the only faced card out of a black deck. Or, even better, do Blizzard or Fade-Out. That screws with their perception of free will.