They don't stand a chance when you have the upper hand.
Gary Jones has created an impossible card trick that is easy to learn.
Four Jokers and 4 signed cards are used. The 4 signed cards are counted and placed in the spectator's hand. The 4 jokers are placed in 4 different pockets and BAM, without any sleight of hand they switch places.
The gimmick does almost all the work for you. This trick is a worker, it packs small plays huge, it can use signed cards and it is very commercial. This is a trick Gary uses all the time.
This is impossible magic for ANY skill level.