If you enjoy merking baddies in BioShock: Infinite, then this achievement (aka trophy) should be a pretty fun one to go after. The "Industrial Accident" achievement is unlocked after killing 20 enemies with the Skyhook.
In order to perform a Skyhook kill, you will need your enemy to be at low health and then press Y on the Xbox 360, Triangle on the PS3, and Space on the PC. It has been suggested to complete this achievement earlier on in the game since the enemies will naturally be a little easier to kill for completion of this task.
Check out this super short guide of how to unlock the "Industrial Accident" achievement.
Click here for more achievements/trophies for BioShock: Infinite.