Joker's wild, as the name suggests, is 
a great little card trick that uses a
joker, and four other suit cards. You ask
an audience member to memorize one of
the suit cards, and keep it as secret.
Take the cards, give them a bit of a
mix-up, and then you'll remove one as a
prediction, which I'll place my top pocket for now.
For the first time you then ask the audience 
member to name their card out loud.
(King of Spades)
Reach into your top pocket, take out the card,
and you can proudly show that you
predicted their choice the King of
Spades. This trick also comes with a
kicker finish because, as the name
suggests, the Joker has run wild, and all
other suit cards have now become jokers.
