Guys I haven't been posting much here but lately but that trade was worth 23 million.
I use this site to check the course of trades:
http://www.stocknessmonster.com/
If you check the time and compare it to the price chart during the day, there was a dip of 1.5c at 2:42 pm when this trade went through but it recovered promptly:
http://www.google.com/finance?q=ASX:pna