In the scene where Holden tells the chick that he loves her, and she gets out of the car and runs away. He starts to chase her and then turns back. As he was walking back to the car you can see the refelction of the entire camera crew in the glass behind him. It is quite funny!
I went back and watched this part of the movie. I didn't see any part of the camera crew in the reflection, but what I did see was Alyssa right on Holden's heels in the reflection when he was walking back to his car (right before she supposedly runs in to his arms). Good catch.
No, I'm pretty sure this is a slipup. Unless of course Alyssa was standing still holding a camera right before jumping into Holden's arms. Maybe it was merely the ghost of Silent Bob, considering it's very likely that Kevin Smith was holding the camera...
This is a slip-up but one that was actually caught by Kevin Smith, Smith saw the camera crew during the editing process, but because he felt that Ben Affleck and Joey Lauren Adams had acted to the best of their abilities in that scene he decided not to worry about such a minor slip-up. (See the offical web site for more information)