Comment by belter

The two switches changed in sequence, but within the same second and at max speed. Dont think a human can have such a timing. If you look at the timing it looks more and more like electronical or software triggers.

Another possibility is a foreign object like a personal item sliding back during acceleration.

I looked at both pilots background, and unless a story of medical depression on the part of the captain emerges, I dont see the pilot suicide as plausible.