WOW! Leon,that's really quite an amazing capture-well done.You should send that into BOM site,or weather channel,they would use something like that on a calendar. What settings did you use? and did you use a lightning trigger? I bought one for the summer,but its still in its box-never used,never had a lightning storm since I've had it!-this image reminds me I should put it in the classifieds.
Good luck with more images