There is a move that saves time but requires luck to pull off. After riding the platform going up to press the button on the top right, if you jump down at a steep angle, you can pass clean through all the way down to the stage with spiked wheels. My fastest time is 46.35s. It's strange because for that race, there was another sub 47s time by BIGDAZ. I believe his time of 46.65s was his fastest ever too. It's unusual to see two sub 47s times in one race. There's another player good at this race, namely <h!<0, who has done sub 47s too.