To blind fire, first move into cover by pressing X. Then shoot by pressing RT without aiming with LT.
There are 8 bad guys to kill using this method: pawns are the basic human sized enemies and sergeants are the larger foot troops that are armed with Disintigrators (shotgun/grenade launcher weapon) or Reclaimers (sniper rifles).
1) Blue Pawn, found first on mission Crash Site
2) Red Pawn, found first on Spare Parts
3) White Pawn, found first on The Survivors
4) Silver Pawn, found first on Propheseid One
5) Blue Sergeant, found first on Crash Site
6) White Sergeant, found first on Propheseid One
7) Red Sergeant, found first on The Survivors
8) Gold Sergeant, found first on The Revolt