If you meet the guards in the tee junction, everyone just stares at each other for a moment.
For a moment they stare at you staring at them. Then they draw their weapons.
If you approach the guards in the tee junction while they're distracted:
You stroll down the dead end to where the guards are. They turn, look you up and down, and all simultaneously pile on top of you.
The player can blow themselves up with the blast tab in a flashback, resulting in this reaction from the interrogator:
The man is staring at you as if at a joke he doesn't, quite, understand. "And then you died."
The player can answer "yes". The man only shakes his head in disgust.
Stabbing yourself with the knockout pen in a flashback results in this response.
"Believe me, we would have been delighted to find you lying unconscious in the hallway. We were not so lucky."
If you try to take the lone guard's uniform off his body during your confrontation, you'll get the response:
He doesn't look like he's interested in that kind of thing.
If, upon escaping from the interrogation chair, you attempt to kiss the man with the command "kiss man", the game will tell you, "Keep your mind on the game."
Examining the squad of unconscious guards tells you: "They look like six unconscious guards."