I've been playign L4D dead since it's realease, and being stubborn would only play it on expert with at least 3 friends. So it's all fun and dandy, with the AI Director being a constant twat everything run smoothly.Now I find my self getting to the Finale of No Mercy inparticular. ( trying to finish the Maps on Expert in order. ) I can't see to find a working strat that'll ensure the on going pounding from the swarm. I've tried the Hallway strat ( seems to be the best ) turtling the Sped infected into the same locations killing them repeatedly. Then Setting the next tank on fire and kiting him around, to reassume the same spots. This works until about the common mistake, or Sped infected bug (i.e. Boomed through a wall or closed door, even obnoxious distances. Hunter pounce bug, that smack the survivor and bring hp to 1.) Other times, just poor tank management. Maybe it's a matter of everyone stepping up their game; or the AI director giving the team some slack; and/or a **** load of luck.I haven't found any other effective strats that are solid enough other than turtling the hallway. Most think i've read up about are bugs and glitches players used to squeeze by, and i'm sure they've all been patched. Any opinions or successful attempts you've had would be very informative.

this is a great topic I can't see to find a working strat that'll ensure the on going
pounding from the swarm. I've tried the Hallway strat ( seems to be the
best ) turtling the Sped infected into the same locations killing them
repeatedly. Then Setting the next tank on fire and kiting him around,
to reassume the same spots. This works until about the common mistake,
or Sped infected bug (i.e. Boomed through a wall or closed door, even
obnoxious distances. Hunter pounce bug, that smack the survivor and
bring hp to 1.)
mark456
One of the great things about in-game money and virtual economies is that they never went through this whole economic meltdown. So take that to all of those people who think the real world is better then computer games!
Buy WoW Gold

Yeah that's what i've been dealing with, just a freak bug at the worst time. That hunter bug hasn't happened since one of the recent Patches on both PC and Xbox.