With those large throttle controls, it would be difficult for someone to mistakenly put the throttle in the wrong position. However, how many of us have dosed off on the keyboard and woke up to pages of "z's" in the document. I think Bostian similarly dosed off and leaned forward on the controls. He woke up to his assistant conductor yelling at him to "Wake up!" The only thing he has left was to apply the brakes.
Where is that assistant conductor? There are two seats in that control cab.
(The controls DO look a little like Mr. Garrison's "IT"!)
(High performance German locomotive. As with a Mercedes or BMW ... you probably think you're driving 55 but look down and it's actually 105.)