The demo car they showed most likely has no batteries or even a metal frame. They basically built a car shaped drone powered by compressed air.
Example RC toy car that drives on the ceiling: https://www.youtube.com/shorts/uR_mNcRlNsA
Example RC toy car that drives on the ceiling: https://www.youtube.com/shorts/uR_mNcRlNsA
Even if it is, they show interior, wheels & a distance shot of the rear opening showing a large air tank - very little can be seen of the actual chassis or engine.
Whatever tricks were done for the demo - whether the car is real or fake - it's highly unlikely what was shown today will ever be like-for-like accessible to consumers in the production model.