"GLADoS," Tyler said at once, ripping the cord from behind Wheatley's ear. "They woke 'im up, set 'im online, and the first thing 'e did, near as I can tell at least, was release the neurotoxin. Everyone in the testing chambers or Relaxation Chambers are fine..."

Wheatley looked up as the walls started to move and half fell over one of the dead technicians to get to Chelldon. "Oh God! What's that?!"

"'E's been reconfigurin' the soddin' place for the last twenty minutes, pushin' rooms around, combinin' levels. 'Asn't noticed us yet."