How not to approach me (or, anybody)

Today, the general manager of a camera store in Thailand rudely interrupted me as I was introducing the Lytro camera to a few of our Photokina photo walk attendees. He literally walked in between me and the group; the very first thing he asked was, "Where is your manager?" I assume he said this because he is an older Asian guy and I look like a young-ish Asian guy. He must be very traditional. I can respect experience and wisdom, but the automatic assumption of hierarchy due to age is barbaric. Also, I'm American, and I am just not into that sort of implicit relationship (Ren, the founder of Lytro, is even younger than I am). After the rude introduction, he proceeded to brag about himself for a few minutes, making a few demands. I won't go into the details. I did my duty and referred him to our sales team, but I can't say that I was overly enthusiastic in my recommendation to follow up.