The figure is not so unusual.
As trees grow they twist as they track the sun each day, add to this the weight of the canopy compressing the trunk and you can get figuring like flames and then quilts.
Especially when it is a real big arsed tree
I know very little regarding timber and the whole mechanics behind grain and figuring. That why it blows my mind when I see something different, Mother nature is definitely the winner when it comes to artwork.