A Nuclear expert who can’t negotiate the extreme science of taking a step. Hmmmmmmmmmmmm?????
Nothing to see here. Makes perfect sense. Move along please.
It appears he fell down the open space in the middle stairwell. However, the barrior to the stairwell is about 4 feet high and follows the stairs all the way down. It would be kind of a freak accident to innocently “fall” into this stairwell.