don't know if this has been posted but we was messing around doing the power nodes easter egg, but a massive fail we didn't get the death machines, so we just messed around on the phd floppy platform, i got a death machine after killing few zombies, so from the top of the stairs i was just shooting into the doorway towards pack a punch route, when all of a sudden a white light appeared as if there was box there but the light was more intense, so we looked what was there and there is a load of rubble and some generators, hope some one else can give it a go cause the people i was doing it with were rubbish