Continuity mistake: Once Billy Numerous splits into 10 copies, you see the Titans standing outside the T-Car. The boys are on the ground and the girls, Raven and Star, are hovering above them. It then cuts to a camera move going around the car and suddenly Raven and Star are hovering above the car itself. (00:09:45)
Continuity mistake: After Cyborg is hit by the truck, he stands up and sees three Billy copies in the back of it. The one on the right has his arm behind the leg of the one in the middle. It then cuts to a close up and suddenly the one on the right has that same arm out waving at Cyborg. Also the box on the top left has dirt appear in the left corner below the lid. (00:13:25)
Continuity mistake: When Starfire asks what is the Maximum 7, her, Robin, Raven, and Beast Boy are standing together looking at Cyborg in a wide shot. Raven is slightly behind Beast Boy but to his right, and her body is facing to her left. But then it cuts to a close shot from in front of the Titans and suddenly Raven is on Beast Boy's left and right beside him, with her body facing her right. (00:03:50)
Chosen answer: It is located in California, as shown in "Teen Titans: Trouble in Tokyo". Possibly San Francisco as seen in the comics.
MasterOfAll