http://www.youtube.com/watch?v=jB3pr_EO6YA
u mean that one ?:P
i would suggest the 2 card monte always gets great reactions and if u play it like this
you show them a red queen and a black queen

do the trick and ask them which one they think is the red queen and which one is the black queen..
they hasitate and answer... after that just ask if they would find it impressive if you could change those cards (they think u mean that u will change the order of those ) after they said yes or no

just work ure magic!:P make sure the replaced cards dont look like queens...
thats what i call thinking out of the box:P
ehmm if it is a large group and u have a chair u can put a spectator on i would recommend a (dont know how the trick is called)
but this is what u do (place the spectator on the chair) stand next to him left side is the best i suppose if right handed.... bend down forward and show him some tissues ...

pick up 1 tissue make a ball of it

and ask him to look closely... (ask him to put his elbows on his knees and head on his hands) after that just play a game which hand is the tissue in...
after 2 times he probably is ready
the 3th time u say ure gonna make it harder... u better inform the other spectators that ure gonna fool him big time if else they probably F**k ure trick up
the 3the time when u do the sequence u just throw the tissue behind u when ure doing some hand movements to confuse him which hand it is in...
if he is really focussed on your hands and really wants to beat u

this will guaranteed work

and give great laughs to the others
u can mix the trick with some false transfers or just act like u pick up a new tissue and crumble it:)
PIXEL is a real good trick also because it rises OUT OF THE PACKET(instead box )