Paxton & Salty Explains Where Is Sidney Going? Is He Going Over The Bridge? Is He Going Over Thomas's Branch Line? Or Going Under Right Next To Daisy & Emily? Sidney Wanted To Go Over & Under Places. When Sidney Arrives At The Dieselworks, While Sir Topham Hatt Arrives And Onboard James. He Tells Sidney That He Needs To Do Our Work Instead Of Moving Over & Moving Around. That Made Sidney Felt Worried.