This is a showy little trick--in reality a bit of juggling that looks very difficult yet which can be easily learned.
Balance a card on the tip of your left forefinger. Upon it place a coin-- the heavier, the better. With your left forefinger flip the card, and it will sail away across the room, leaving the coin balanced on your finger. This is a very pretty and surprising; once you have the knock you can do it every time.
I knew someone once who had a collection of playing-cards that she'd found on the street at various times; she only had four and they were not a particularly good hand for any sort of game. I remember this because it's something I'd likely do; except I tend to come across entire decks (or most of them) spewed out on the ground.