feck that scared the shit out of me. The first time I did it, I hadn't been upstairs at all and killed the zombies/looted around, so I pull the generator and get attacked from behind (first scaring the shit out of me moment) at which point they all come down to play, so I kill them all. With all the Zombies dead, I figure I can turn the generator on now, and there is no one upstairs, so I can loot around and take my nice sweet time.
Of course, I turn it on and they all re-spawn, with the Large feck off spitting thing walking straight into the generator room immediately. So I shit my pants and leg-it up the stairs (with everyone giving chase) find the door, it tells me I need a keycard, at which point i'm cornered in the corridor with them all coming at me, so I die.
Game loads me up by the generator, before it's turned on. This time, I go upstairs, loot around, grab the keycard, then I go to turn the generator on, assuming the beast is downstairs like last time... so I leg it up stairs, leg it down the hall, take out a zombie that comes at me with a one shot melee attack, go to turn left down the second hall and I run straight into the Beast, who rips my face off... I actually shouted "feck Me" when it happened... bloody terrified me.
Anyway, Vantheman, in my game, it appears to be totally random where that Beast spawns (third time it was in the side room and he came out into the first hall, but I just ran straight past him... thats how I beat that part anyway.