I wonder what the tax rate on his windfall, 50%?
Plus 3.8% for Net Investment Income Tax.
Plus, he resides in CA, so tack on ~12% (he's making so much marginality doesn't really affect things) in state taxes.
~36% in total, which is a lower effective tax rate than many people here, but not quite as outrageous.
That page also calls out a "net investment income tax" that sounds like it would add an additional 3.8% on such large capital gains.