Portal: No Escape
As a companion piece to the marvellous Portal Proposal Video up on RPS the other day. I found this wondrous fan-film (to call it that is doing it something of a disservice, mind), more fan-trailer via William Gibson (yes, that one) on Twitter.
Normally I hate these things but this is pretty damn impressive.
(Reccomend clicking through to youtube and whacking the thing in 720p/1080p and full screen)
Edit; see I've been beaten to this already. Anyone know how to delete your own threads?!