They had a large scrim overhead to soften the light for this setup.
On the hill above where we stayed they had set up a half-pipe with BMX cyclist riding so we could put the a9 through it’s paces. Because I was using my 16-35/4, which didn’t have the new firmware, I wasn’t able to get the full 20fps out of teh a9 but it was still crazy fast and great at tracking focus, even with the backlight for the sun.
Overall I was very pleased with the camera, super fast and easy to use. Plus I really, really love increased buffer size! If you need speed, the a9 is absolutely worth a look!