...Rather, this is a great effect for use when at a party or something (or a private gig)...
Absolutely. If this is in your repertoire, then you can wreck a $2-4 deck of cards. Don't whip out a crappy deck with a hole punch through it when you are working a real gig. (or I suppose if you lived somewhere that nice decks are expensive to ship to)
Lots of other great ideas here too.
...I would be happy as a little girl on the swings...
lol
Justin