Though I support the 'inside job' theory, I wonder if maybe the first guy on the street sounds like he's saying a rehearsed speech because he had already put his ideas forward to the TV reporter, and then the director decided to put the guy live on-air in a few minutes. So then the guy on the street stands there rehearsing in his mind everything he's going to say. When he finally speaks, he therefore sounds fake. What do you think?