X colored car dropped in Y seconds trick

I think this was the most obvious trick he did in the car salesman episode.

When he was putting the 3 cars in each hand, it seemed like he spent a lot more time describing the first 3 cars, with extra emphasis on the red car. They were also primary colors, so there is probably some kind of familiarity aspect working there which would make a person more likely to choose that hand over the other one, and then the emphasis on the red car makes them select that one.

Even more obvious was the time thing. As soon as he started snapping his fingers, I had a feeling that was a major part of the trick, and paying attention to his snapping proved that feeling to be true. When he got to 9, he did a kind of quick double-snap and that's when the guy dropped the car. I only saw it once, so I'm not sure about this, but from what I remember he also dropped his hand in between those two snaps. Maybe to force an idea of "falling" into the guy's head to make him let go of the car.

Even the stuff that was explained (red/yellow BMW, blue tie with white dots) wasn't as obvious as this trick was. And some of the other stuff may have even been fake. But I think this one was really obvious.