I am stuck towards the end of this episode when trying to unblock the second ventilator. Playing on the PC is probably not the best way to play but I can't seem to press the 'E' button fast or hard enough to avoid getting drawn into the fan. TBH I hate this particular aspect of games - not sure quite what the game developers thought it was testing, as it seems to be more a test of the keyboard sensitivity than anything else. Had a similar problem with The Bunker where I had to used a utility to amplify the mouse sensitivity.