Portal anomalies

Here are some weird and/or interesting things I've found in Portal:

Chamber 19:

1. The energy ball that blocks your way to the fire-pit. It's green.
2. The large fans you have to portal behind after the fire-pit. Pick up a barrel and throw it in. The fan breaks.
3. A load of things glow that probably shouldn't - look at the Aperture logo on the GLaDOS speakers. It glows.

All chambers:

1. noclip into some of the observation rooms. Blue doors.
2. Objects can get carried to the next level. Noclip into the elevator room at the end of chamber 17, portal placement never fail, and shoot the wall next to the emancipation grid. then go to the start where the companion cube is, and fire the opposite colour portal. put the WCC through and go in yourself. Proceed to level 18 with the cube!!

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