So from all these posts so far, apparently the game is nowhere near the same experience for everyone as I thought it would be. I did exactly what hsrob did the first time. Went in there like john Wayne, ran outta ammo and died. Second time thought I holed them all up at the entrance. No special cut-scenes no nothing. In fact my first meeting with the chainsaw was much much later, In the leader's house after Ada is first noticed.
On the other hand I never really figured out how to kill the garridors up until the very last encounter with them. Just shot at them randomly until they died, turns out it was much easier than that.
Did you figure out the trick with the bells? Oh, and definitely HATE flash grenades