Rushen had just lost control. If I had been the ref, I would have excluded Rushen then. As for him being a 'minor', he is a big tall young man. He is a future champion, but he needs to calm down a touch.
I remember in 2008? when Jason Lyons missed the gate and overtook the other three riders down the back straight on the second lap: must have shook them rigid!
Or the occaision when he overtook Ole Olsen, who was in his pomp as World Champion; then someone at the back fell off. In the restart, Finn overtook Olsen again. But Ole was the only one Finn seemed to want to impress.