I love fan-made films involving my favorite video games. There are a lot out there and I've seen most of them. Of the ones I've seen, a very small handful stand out and this is most certainly one of them. Visual proof that a Portal movie is possible with the right approach.
Portal: No Escape is a live action short created by dantrachtenberg1. It features a lady who apparently wakes up with no memory of what happened or how she got into the position she is in. The rest, doesn't really need explaining. Enjoy.
This is very impressive, and proof that a full length Portal movie would completely rock.