Creative Portal 2 level design

Presumably the man who commissioned this Portal 2 level and the woman to whom he wished to propose marriage are big Portal fans. Boing Boing wrote it up:

http://boingboing.net/2011/08/23/engagement-proposal-as-an-elaborate-portal-2-level.html

or you can go straight to the video:

http://www.youtube.com/watch?v=o8SdYz7cq04&feature=player_embedded

or download the Portal 2 level:

http://www.tophattwaffle.com/?p=2793

It has custom narration by GLaDOS (Ellen McLain) authorized by VALVe.