Need help for Tank Burger

Well, I have quite a few achievements I need help on ..but I decided this one..since it seems..easier than the others. Tank Burger is the one where you kill a Tank with melee weapons..
I have Steam by the way. Just add me on there I guess my ID is RavenUmbreon just tell me who you are so I don't get confused and reject the invite. xD

Mann,that achievement isnt easy to get at all,first you have to somehow spin around and hit it in its back,still,you get hit by him. my best conclusion is to wait for the tank to come to the safe house then kill hom through the safe house door with a melee,i still havent tried getting that achievement yet