Doh. I was getting my roads confused. For some late-night reason, I thought this was up the Central Cross. Which is highway 8, as every schoolboy knows.
Agree with MM, this is just a vid about a one-way trip on the Southern Cross, and a bit misleading. They don't show the retracing of scooters back down the west side.
I bet they weren't singing Hallelujah all the way back down either.