Why would a plane ascend because of a struggle in the cockpit? You don't just climb 15000 ft at that altitude because someone fell over the controls. Someone ha

Why would a plane ascend because of a struggle in the cockpit? You don't just climb 15000 ft at that altitude because someone fell over the controls. Someone had control at that point. Had there been a struggle, a descent would be the most likely outcome. All the explanations I've heard so far contains way too many assumptions. Ockham's razor. Here's another scenario: hypoxia. Makes you retarded and euphoric. Like being drunk but with less disassociation. Suddently, it's a great idea to climb! Oh wait, nope. Better descend. Are we on course? Better turn. Hypoxia and/or stress. Look at AF447. All pilots know what a stall is. But when you're flying at night in bad weather with S:t Elmo's fire all around you and the airspeed indicator stops working and you believe you need to climb, you might react without thinking. Oh, we're losing altitude? Better pull up!