Visible crew/equipment: When Anderton is being chased by the pre-crime officers down the alley they pull a sick stick on him, which he then uses on one of the officers. If you freeze the image (better achieved on DVD) the officer is actually being sick out of his lower chin, not his mouth. This is obviously a result of a badly placed 'sick-guidence' tube on his neck.
Visible crew/equipment: When John and Agatha come to Rufus T Riley's place there is a low camera view of them walking through a doorway as Rufus starts saying about Anderton getting 'a little jerky for himself'. To the left of the doorway the crew are reflected going backwards filming the action.
Visible crew/equipment: When John Anderton is walking around the hotel room before meeting Leo Crow, just before he spots the photos on the bed, he glances over towards the direction of the bed - if you look to the left of him, you can make out a cameraman's face and hand where he is holding a camera in the reflection of the glass window.