I just got an x-box last week, i am not much of a gamer so please dont come down on me too hard, but in the second task of GR it tells you to destroy a building or something like that to create a road block. i keep getting killed by the tanks, how do you get past this, i am absolutly dumbfounded, i feel like the biggest loser but i have no clue how to get past this, any help would be great.