PlayTM has only just turned up to the Left 4 Dead 2 event being held near London Bridge and already they are scared witless. Not just because they have had to walk by the London Dungeons to get here. And not because a seven-foot man in spooky make-up and top hat and tails has been eyeballing them. No, the reason they are scared is because they are stuck in a tunnel with two of the most insanely overzealous actors pretending to be zombies, who think it appropriate to stand groaning two inches away from them while they are trying to talk with the EA PR team. Where's a chainsaw when you need one?