Half Pack Reverse Card Trick
Having
secretly reversed the bottom card, hold the pack face down in the left
hand. Cut at about the center, opening the pack bookwise, the backs of
the cards to the front. 
A
moment before you separate your hands slide the bottom card of the
right hand packet face up on top of the lower portion and at once turn
the left hand over towards the right, showing this reversed card which
will appear to be the bottom card of that packet. The move is covered by
an upward motion of both hands as the cut is made.
Show both
packets back and front. They appear to be perfectly regular and that in
the right hand is, hut the left hand packet has a card reversed both at
the top and bottom. Turn this packet face up and on it place the right
hand packet face down, so that the packets overlap about half way. Hold
them in this position vertically, right thumb at bottom and fingers on
the top. The original reversed bottom card is towards the audience and
the card reversed in the cut faces you. Show the packets back and front
and it will appear that half faces downwards, the other half upwards.
If
the two visible cards that face one another in the middle are of the
same color you say that they should differ, or if they differ say that
they should be alike; in either case, still holding the packets
vertically, slide out the faced card of the lower packet, turn it over
and insert it in the top packet. "That's better," you say, and at once
push the two packets together, square the deck and hold it face down.
Pull
out the bottom card and with it fan the deck, then drop it face down on
top. Spread the cards out on the table with a flourish. All of them
face the same way.
