Can anyone suggest any creative, radical and fun ways to get business cards in a retail business show?

I am trying to put up a booth in a business retail show in two weeks and I was wondering if anyone has a really unique and mind-blowing idea to attract clients to my booth and give their business cards. Any suggestions will be entertained. Thanks;-)

yes. place an aquarium with piranhas and a sign "Do not feed the Piranhas" and put the business cards next to the aquarium.