On the other hand... I worked for a year or two at a store that did Aura readings via biofeedback. What came of that experience was that I learned that you can be surprised what you can determine from people just by looking at them for a few moments, though there can be some false signals, its not that hard. You just need to be careful not to manifest your snap judgment onto the person forcing them to be what you think rather than who they are. (ie, let them be themselves and see if they prove you wrong)