I got burned by this too. I feel your pain.
Dad figured out that if we hosed the concrete driveway, it made a better seal, and handeled bumps and impetfections better.
It was a glorious 3 minutes before the water started to seep in to the concrete quickly. The Typhoon nosedived and tore its skirt.
0/10 would not hovercraft again.
Now go back and watch Hilary Clinton's Between Two Ferns interview, and let the layers of that joke unfold