Visible crew/equipment: When the dog catcher is locked out from the outside and he is trying to get back in, you can see a crewmember with arms around his neck reflected on the black door.
Visible crew/equipment: When Carl and Lois are in the hotel and Carl finds his sound system, you can see a crew member reflected on the glass window of the door.
Visible crew/equipment: When the kids are running from the cops there are flashes that are supposed to imitate lightning. In one shot a strobe light creating the effect is blatantly visible when the camera pans up to the sky.
Answer: Lots of people were running with the dogs to the hotel so someone could have very easily helped Chelsea get to the hotel the easiest way to get her there would be to carry her.