The perfect ice-breaker! After this, you'll have them eating out of your hand!
Picture yourselves a scene; a beautiful unapproachable supermarket cashier is staring at you with a bewildered face, as you channel waves of mental energy into your credit card causing it to slowly bend and unbend to your accord - simply by gazing at it.
All around you, people that were waiting in line, simply forget what they were there for in the first place and become an admiring audience that is convinced you possess supernatural powers!