just looks like a bit of PIO as he flares in ground effect. bit of a bump, but it was a highly modified plane at that stage (new more powerful engines) with a very unusual configuration (double delta, retractable canards etc) that had not flown for many years and the guy flying had either zero or very few landings in it before that flight, despite being very experienced.
imagine flying a huge unknown delta bird like that for the first time with folks taking pictures. You need balls
