The vestibular system won't detect a roll rate of around 2 degrees per
second. So, he could have found himself (or perceived himself) inverted,
and tried to pull rather than roll to upright. Another scenario is a
graveyard spiral, and again, a hard pull could over g the airplane. We'll
probably never know.

This is not so much an issue of how he dealt with the situation, but the
decision making process that lead him to take off into poor or deteriorating
weather. Again, it comes back to training and judgment.