There are two instances in this movie that I found where the camerman's reflection is rather obvious.
First instance: Jack has just jumped out of his jeep and is now running down the freeway after the bus. He punches the door and cracks it and says, "Open up!"
The bus driver then says, "Get off the door man. This ain't no bus stop."
The shot of the bus driver as he is saying this through the bus door. If you look at the reflection off the bus door, while the bus driver says his line, you can see the huge camera in the reflection, as well as the camera man running beside it.
Second instance: when Jack is getting the people off the bus, they are one by one being led off at the rear entrance, on a wooden board to the other loading bus. There is one lady who is being led off - she has weird pointy glasses, red lipstick, and her hair in a small pony tail - and is quite noticeable throughout the entire film. The one-second shot of her walking across the wooden board show the reflection of the cameraman on the bus' open doors. The cameraman is on a jeep behind the two buses, sitting down with his eye looking through the camera lens. It is only a one second shot, so pay attention to the windows of the bus doors while she is walking across.