Can I help you , sir ?   Yes , I've been sitting here for a few minutes . I'm waiting for someone to put gas in my car .   I'm sorry , sir . But this is the self-service pump .   Self-service ?   Yes . You must fill up the car yourself .   Are you serious ?   Yes . Are you traveling here ?   Yes , I'm from Taiwan . I never heard of a gas station where you fill up your own car . 