in all the years i've been flying in a simulator, i've never seen an airplane hit the ground. we recover before that happens. >> reporter: so that was unthinkable for you? >> yeah. hard to see. >> reporter: roger takes us through a manual scenario, explaining the germanwings pilot likely did not do this based on the controlled descent. >> pull up! >> reporter: uncomfortable. >> it is. let's just -- can we come out of this? >> pull up! >> get out of this. no need to take it through the -- >> pull up! >> reporter: even in the simulator, in a scenario we've asked him to do for the purposes of the story, this pilot cannot stand it. does it exceed pilot instinct? is it human instinct to pull up the stick at that point? >> yes. i'm thinking about the safety of my passengers, crew, and attendants. >> reporter: is that why the incident has so disturbed the