When a hovercraft is not producing cushion pressure, the drag relative to the surface, be it water or ground, is very high. If you touch down at high speed, with high friction, it's going to be bad (particularly with no seat belt).
I quite agree - as an ex hovercraft pilot (I actually managed to place 3rd in my formula in the 1991 world championships), engine failure in this could be pretty horiffic. In a normal single engined light hovercraft which produces both your thrust and lift, as an engine failure can produce something known as a 'plough-in' on water where the front end drops and digs in and stops you pretty quickly for which i also have first hand experience, lol. I wouldn't want to fly one of these more than a few feet up
