The fact is that Robby's have limits. You can either accept those limits and have a happy career, or you can ignore them and die!
There was a guy who used to fly his Robby into the clouds a lot, and then post videos on youtube of his awesomeness. Then he died flying his Robby into the clouds!
I don't know why Kiwi's have such a problem with mast bumping their Robbys, maybe their turbulence is different than everyone else's
Whatever it is, Kiwis and Robbys just don't mix, and they should probably just stop flying them!