It's really funny the situations that these stealth games put you into. The best one so far is depicted in this video. Sam Fisher of the 4th Echelon has to go in and play secret agent gone firefighter. Hilarious. Then he has to go and hunt down the terrorist cell that apparently did not hightail it out of the building during the time that Sam was busy playing with water.

It does highlight some of the killing techniques by which you can take down an enemy. The first scenario shown forces the player to be stealthy, since the terrorists are decked out in protective gear. So you come from behind and take them down or throw an incendiary grenade at them if you so chose. Although I believe that those incendiary grenades will probably be very limited.