They got it. Already on the wheels save!

Just imagine what I experienced when I saw this train yesterday. Okay, I would just look at it and go on, so I had to drive it from Nizhny Novgorod to Moscow!
Lived, came down! Already on wheel sets save. Instead of four, there is only one! Where does it all go?
All the way I went with my eyes closed on this "one-wheel" train and firmly held on to the armrests of the chair.