David Lynch moment...
At first I thought the conversation between Rosow and the FBI agents occurred in a dream. I was surprised when he pulled the glowing sunglasses out of his pocket after he entered the trunk of the taxicab.
The FBI agents didn't complain, or try to stop him, when he entered their car. That doesn't seem normal. Then they offered him a pair of sunglasses for children which they picked up during their "excursion" to 7-11. And overall the conversation between them seems elliptic and weird.