User blog comment:Diyartifact/Shepard's adversaries/@comment-3228423-20120404115742/@comment-2079715-20120405191558

You'd be surprised how agile an enemy engineer's turret can be. :P So far, the worst fight was Grissom academy. Honestly, I'm downright scared when I'm about to enter the fight on Insanity. It's creepy how fast they can kill you with max shields and armor.