This columnist recently discovered the undulating escalator at the international airport in Bangkok. Instead of separate stairs, the moving track takes you on a wavy downward slope. I stepped on to it and marvelled at the creative design.
Then my bag took off. Whoever designed the thing clearly had forgotten that suitcases these days have wheels on them.
The woman behind me laughed to see my bag making a bid for freedom, and then hers did the same. Next time you visit Bangkok, BE PREPARED. Bring a super-heavy metal suitcase with oiled wheels which will fly down the escalator scattering other passengers like bowling pins.