by kolm » Sep 26th, '09, 15:13
Have them all suddenly match. Obvious, but it's the kind of thing that you would do if you were truly magic rather than have a card face change, locate a card, etc etc
Also, you might get a greater reaction if you say you've used a "subtle marking system". I can't say for certain but it could be worth trying both and see which gets the bigger laugh
"People who hail from Manchester cannot possibly be upper class and therefore should not use silly pretentious words"