To start off I wanted to say I didn't use the word "hater" because I hear it so often and I believe that type of person I encounter aren't haters but, a type of folk that typically hates when they aren't in control of the room. Quick story time, Today I was doing a card trick routine using 2 people (a couple) because I have them kiss and the magic happens because of it. It was at my school out on campus so there was some people around. After the trick was done the boyfriend reacted "oh wow that was cool" and then went on to give me the "how do you do it" questions but, he knew I wasn't going to tell him (you know). A third person watching (The non-believer) interjected by saying "oh well did you see him put your sign card there" I begin to sigh because I been here before. He continues to say "I have a cousin and he is a "Magician" (HE ACTUALLY AIR QUOTED HIS MAGICIAN)" he goes on to tell the couple about a trick his cousin does and how he can see where the card went and whatnot while casually looking over at me sort of (in my opinion) calling me out. So my question is, what is the best way to handle folks of this nature. I have had others go "well, there must be some scientific explanation for this trick" normally I slap my deck of cards or coins down and and ask them to do the trick again but, I come off looking like a defensive jerk this way. Thoughts?