Harm's Way Achievement in Dishonored
You caused 5 unintentional suicides
How to unlock Harm's Way
Powers Required: Possession and possibly Bend Time
This is a bit of a tricky achievement. You must kill 5 people by making them suicide. There are only a couple of ways to do this. The popular method has been on Mission 5 while at the party. There is a Wall of Light there. You must possess the guard guarding it and walk him into the bathroom (make sure no one is in there of course). Knock him out. Now go back and you can possess the various guests and walk them towards the Wall of Light. Right before you get crossing, quickly release possession so that they stumble and burn to ash. This is your sure-shot way to getting the achievement, as some people say guards/thugs count on different Walls of Light, but others claim it isn't unlocking that way.
Alternate Method: If an enemy is shooting at you, bend time so that the bullet is in mid-air. Now possess the enemy that is shooting and stand him in front of his own bullet.