I have stayed a couple of times at the Shinagawa Prince Hotel in Tokyo. Amongst it's many internal wonders (a bowling alley, a movie theatre, an aquarium, a giant pirate ship, weird robots that deliver your dinner) there is also an internal roller coaster that twists and turns through the walls of the hotel. You stand at a pair of doors, they open, a little car arrives from within the darkness, you get in, the doors close. Then you are thrown and tossed around in the darkness. Although I couldn't see any of it, I have always imagined that that roller coaster looks something like these turbolift shafts. So there is a 21st century precedent. But yeah, so weird and cavernous. Dr Who-esque even. But I had so much love for this episode and these characters. The bright colours, the sense of wonder and optimism and mystery and a journey just begun. It made me happy.