Excellent work, frame is nicely filled, great depth of field, frozen nicely, have you tried metering for the sky and using flash to bring out the detail in the skater this can be quite effective too. great image well done
yeah if i had it to do over i would of used spot metering with with my 580ex flash
i actually have lots of good ideas now when it comes to skatebording photos and high speed repetitive flashes also possibly using 2nd curtain synch with a high f value to get some interesting effects
and thanks :)