Suction as I understand it, it had a ground curtain and the blurb talked about the ability to create downforce to keep the roadster version on the road at high speeds.

The same fans that blew downwards to create lift were likely first run to suck it in to the ramp, then reversed.

These demos were not performed by "daily driver" cars - they were multiple look alike props in a magic show, each optimised for the trick shot and not driver comfort or experience (if any driver(s) even took part).

I guess nobody clicks on the links anymore? From the OP: "Our multi-mode fan and ground sealing system acts as a downforce generator, pulling air out from beneath the vehicle. This provides enough suction to hold the vehicle upside down, even when stationary. Powered fans and active wings maximize traction and cornering speeds in all conditions, achieving massive downforce at zero speed. A next-gen steer-by-wire system offers incredible feedback in various road conditions. Activate Track Mode to lower the car and transform the suspension. High downforce or low drag modes can then be used as needed on the track."

Didn't F1 cars briefly have downforce fans (basically suction fans underneath the car) until it was ruled out of spec? Basically a "reverse hovercraft" trick, normally used for handling, but "turned up to 11" here.