There were indeed people at the Ferris Wheel, however trying to figure out the ordeal themselves or were keeping something to themselves that they either cant say or dont know how to say it. But when the Doctor went to get the Ferris Wheel moving, it would move but a cart exploded. One of the engineers stopped the Ferris wheel. "Don't!"
Jack said okay as Arwen wondered about something. "Are the doors locked?"
Harkness shrugged. "I would guess so for safety.but-" That was when he heard an explosion and felt the cart shake. Arwen tried to stay standing but fell on the seat. "Whoa! What just happen?!" She asked with a startled voice. Jack looked to Arwen with just the same amount of concern she had on her face. Hoping that the Time Lord was on the other end he tried to use the phone. "Doctor? Doctor, what just happen?"