george writes:

For some-one to have 'bubbles' develop in the CNS (or anywhere else)
in an aircraft decompression you would have to had been in a
compressed state before emplaning.

You are, because you're at a lower altitude. If you've been diving recently,
the risk is greatly increased, as there may still be extra nitrogen dissolved
in your blood, which might not come out of solution at sea level, but might do
so at 6000 feet.

Anyway, CNS complications are quite rare in all cases of decompression
sickness, fortunately.