I actually rewatched this scene this morning, and what gets me is Moore's facial expression.. he watches two healthy men crumble to the floor and takes the vial out of his pocket, glances at it quizzingly, does this eye brow raise that seems to say "hmmmmm nerve gas.. who woulda thought???" and puts it back in his pocket 
LOL...
I thought as the scientist groped at the glass through which Bond was looking, Rog had a slight sense of horror on his face...
They actually don't show Moore's expression, and it's never clear whether or not the scientist is sliding down the glass in front of Bond or not.. when the air seals take effect on the door, he does look disturbed, but overall, he isn't that freaked out about the whole thing..
I agree with whoever said this scene is just a set up for the fight in the next.. when the samurai shows up... right before they shoot lazers in space

Stupid Moonraker gah!