Thanks for the comments.
The rider always turn the face towards the next barrel on the turn, so the disposition of the face is just right.
At the rodeo performances I always use the Pana 100-300 lens because in most arena I can bridge the needed gap to about 60-75% of the frame. In the above photo the FL is 175mm. More to see from this combination at Smugmug/Santilastudios.