The technique of bodyrocking is the non-verbal version of a false time constraint. You use your body-language to display that you are on the way and won’t stay more than a few minutes. This takes their pressure and fear that you could be a boring guy that they can’t get rid of. But in reality Bodyrocking is only a technique to make the start easier, as soon as the interaction goes well and they notice your value, they will want you to stay. More Informations: False Time Constraint