how to get the achivement We’re in for some Chop in halo 3?

[Hector C]

how to get the achivement We’re in for some Chop in halo 3?

 

[SWC]

I needed that one too and never got it. but i found a website that I hope helps you.

 

[jpitty]

In the campaign on Tsavo Highway, shortly after the second chapter begins, there is a long building to the left that has Trip Mines in it. Grab one of these and proceed to the next area. Here there are Brute Choppers trying to kill you.
You will need to attack the front end of the vehicle for a bit until about two small pieces fly off. Once this happens, it should be weak enough to kill with the mine, so place it down and step behind it, waiting for the guy to try and splatter you. It may take a few tries, but just reload the last checkpoint if you fail.

If you don't fully understand, here is a video you can watch. http://www.youtube.com/watch?v=APgk132oGPg
Be warned as it is 7+ minutes long.