Yes, Cap'n Bicker, that trick with the 500 must be a kiwi specialty.
We did our 500 endorsements with your almost-namesake (sounds the same when you put in his New Zillund ecksunt) in your previous employer's old bus, the C-18 machine. He kept talking about a thung called a Turtle Dick and i couldn't see anything that looked like that. It was up on the roof somewhere...
The airborne sequences included the nose-down-roll-like-crazy dive at the dirt which certainly reminded me of a Macchi in a fully developed spin. He said it was useful for losing altitude - would have been more useful if it would GAIN altitude, as mostly we are down in the weeds anyway.
But certainly an eye-opener!
