After noticing that post from cake about 1337 i had a question.
http://gamrs.co/forums/index.php?app=core&module=attach§ion=attach&attach_rel_module=post&attach_id=1723
One of the
'helpful hints' when loading is:
"special infected cannot break down safe room doors, find another way around"
Does anyone know how to get around them? Or what that even means?