Blue Jet lightning in Thunderstorm time-lapse

I was up on the roof of Coconut Grove Holiday Apartments, Darwin, Australia, taking pictures of this storm 100 km away, yesterday (27 Feb 2017). I just caught out of the corner of my eye a shot of light going vertical. I immediately thought it might have been a jet or sprite, but then thought maybe it was just my eyelash catching a bit of background light. However was amazed to find nestled in the 100s of pictures a blue jet. Never seen one before and don't expect to see one again.