You have to use the portal bumping glitch to get out of the first room while GLaDOS is talking. If you do it quick enough it gives you about a 20 second head start. For the rest of the level my strategy was to grab a cube and use it to knock over all the turrets while simultaneously blocking their shots. Even then I still managed to finish in exactly 52 seconds.
Last edited by AtomicThumbs; 11-15-2011 at 05:10 PM.