Improviser Achievement

I actually got this achievement in the tutorial level (the fifth part, where you're free to do whatever) I hacked the turret which took out the two or three enemies that were on my level, but not the one below. I then lined up the dumpster so I can flatten the guy underneath with the dumpster, and kicked. After he was dead I went into armor mode and kicked the dumpster 3/4 more times to get the other enemy that was down there. I'm not sure if that was a glitch, but that's how I got it.

http://www.youtube.com/watch?v=0CzpCGwIjjk Achievement Video for help to get it on Mission 1

This one is quite tricky, but can be done rather easily on Post-Human (mission 1): http://youtu.be/nAwyHhBNrZg

End of Mission 2 When you and pyscho are riding the train cart together, after you bust through the doors right around the corner to your right you will see a bunch of red barrels with enemies right by them. Shoot the barrels till they explode thus killing your would be roadkill netting you a neat 15G.

@1 i can confirm that his method works. you kick one dumpster on a guy at the end of the tutorial but don't exit once you get your achievement, continue in the sandbox mode to kick another dumpster on a guy to get the achievement

I just threw the same object at two people at different times. Killed one guy by throwing a box at them and when the other guy came to investigate I killed him with the same box...achievement popped.