Ok, this is a little suspicious.

The balls are coming from the same area, there was a slight delay between the first and last balls, and there was a lot of static noise in the video.
I'm going to theorize that 968 decided they had a little spare time at the end of their day, parked something in front of the goal other than a robot, and then let it rip.
Yet again, that's just a theory. Good luck to 968 and all teams! This game will prove to be interesting when it comes time for competition.
-Joe