Portal 2 - Polarity - Crouch Flying Route
NabsterHax has discovered that you can do the flying glitch without being crouched. This allows you basically 0 gravity. It has different properties from the crouched version. You are able to land on the ground AND jump off the ground while remaining in 0 gravity. The problem is, it is only available on horizontal ExFu's. The crouched version is possible on all directions.
Also, you can save the game and keep the glitch. The only downside is after you load, going into an ExFu will cancel the glitch.
Additionally, he discovered you can preserve the glitch (crouched or non) between level loads. This requires you to use the pure (non-portaled) version of the ExFu (meaning, the part that is built into the map), because you'll destroy the portal'ed version's portals, which cancels the effect. Using the non-portaled ExFu also allows you to use portals on the map.
To test this, I traveled from the first level that has an ExFu, until the end of the game (and beat it) while being in the 0 gravity glitch. There was 1 exception because I could not get to the next level without going into an ExFu on the one map, so I lost the glitch, but regained it immediately at the start of the next map. It was pretty epic all around. I have a recording of it, but it took a couple of hours, so I'd need to chop it up to put it on YouTube, or just upload it somewhere for download.
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