I'm just at the dam... and so far I've only seen a cell dude fall into water and not only act like he had no idea he was in water - shooting at me, etc.. but I couldn't shoot him as far as I could tell. I finally fragged him and that worked. (don't jump in the water if this happens, as you can't shoot at all when swimming, and he'll just blast away at you!)

The only other thing is I stealth killed someone with the bow (can you get more stealth from a distance?) and a second later another guy throws a grenade *right* where I'm standing. That psychic thing is still hanging around from Crysis 2. At least I can shoot while stealthed and not have the bullet go where I was aiming when I entered stealth!