In Deus Ex, what will normally incapacitate a mook will kill JC. At first I thought it was because they are lazy, but I then realized that the UNATCO made it so that if he is incapacitated, he activates a pseudo killswitch which will have himself self terminate if he is involuntarily incapacitated.
I always thought of it as seeing that if you pass out in enemy territory, it is just shorthand for saying that the enemies would have finished you off when you were out. Although the puddle of blood under you would support your theory...
Also, his Hyperactive Metabolism means that the bronchitis caused by prolonged exposure to the tear gas manifests much more quickly than was intended, since the nano augs process certain things quicker. This also means it can directly affect JC and prolonged exposure can lead to death.
In Deus Ex, you always open to a particular section of a book, even when it's closed, and typically to the pages most pressing to current events, or the ones that are most contemplatitively philosophical. For example, behind the Clerk's desk in the 'Ton Hotel, there is a copy of G. K. Chesterton's The Man Who Was Thursday, and you open to a discussion of political and philosophical anarchy. You might think "Well, why do we open to that page instead of any particular other?" Because, being the eruditeSuper Soldier that he is, JC opens directly to the section that interests him.
In the beginning, Paul will scold you if you choose to mainly fight your way through Liberty Island, which makes sense as he's a firm believer in Thou Shall Not Kill. It later makes even more sense because those were his men you killed.
Why does Walton Simons's voice always sound like he's five seconds away from falling asleep? As the head of the Federal Emergency Management Agency, he would of course want to have a reassuring voice, false as that reassurance may be.