i ever ride in the cab from changi to expo..
i am not lying..
the feeling is great.. cab was darken and the train was driving
around 50 km/ph
well.. i learn alot in the cab.. thanks to the kind TO
i saw the crossover track too.. make so loud noise.. bang bang
bang bang
the bang bang sound is the sheer essence of railways 
i like looking at the train race when the airport line and main
east-west line trains move concurrently ^^