Thread:Stu-art McMoy .5/@comment-24372400-20151007214534/@comment-10109148-20151008221410

Mucker builds a special speed booster for trains and has Thomas test it, but after the test, the booster proves to not obey it's engine's orders and will accelerate out of control. And it can only be stopped by hitting the emergency stop switch on the outside (from where the engine's driver can reach). So Mucker concludes he most fix it, however while he's away. Koko decides to use it to go faster than her normal top speed only to end up speeding dangerously out of control and thomas must save her.