I never get to see them live!
I listen on the HKJC site and then usually watch the replay right after (thankfully it's posted right away) but I'd have a better chance of taking the space shuttle out for a spin that to actually see Sha Tin on tv here.
Barrier trials... (BLzae King and Green Birdie in batch 1)...
http://www.hkjc.com/english/press/btrs.asp