Yeah, it is hard to see but I'm pretty sure the line you selected is the G meter line. It stays at zero until the RPM goes way up and then it starts to go. I'm not sure how Greg did his staging. It honestly doesn't look like he was using a two step, looks more like a foot brake launch but he'll have to describe how he launches. What I see is something around 1500 rpm (could be fast idle) and then at the last moment the RPM steps up to around 4000 rpm and then goes up to 6300. But it never holds at 4000 rpm like it would on a two step.