A quick trick with two cards.
The Queen of Clubs and the Four of Diamonds
But it could be any cards really
I'm gonna do something a 
little odd with these
We'll take the Four of Diamonds
and fold it width-wise
and then similarly, take the queen of clubs and
fold it lengthwise
I've always noticed when I do this
 in real life
people always go very quiet and I think it's
because most people have the same pack of cards
in their family
for a couple of generations whereas these are
tax-deductible to me
Just excuse me for a moment
I'm gonna place the Four of Diamonds
inside the folds of the Queen of Clubs
that really is inside. 
You can see it all the way in the middle
And if I want to get the four diamonds to the outside it's
pretty easy will not have to do is
reverse the whole package like so
Nothing strange so far.
Watch this!
Isn't that weird?
You can see it on both sides
The Queen of Clubs seems to have reversed
it goes back the other way
and then
If I push that to the halfway point
and tear it
unbelievably the Queen is facing inwards
on this side and outwards on that side
