It was most likely done exactly like this one: http://videosift.com/video/Contact-Tricky-Mirror-Scene-Where-Is-The-Camera

Which is to say, a green screen and two separate shots that line up well enough to fool anyone not paying extremely close attention.

Tags for this video have been changed from 'luc, besson, movie, love' to 'luc besson, love, Angel A, Mirror Scene, french, mirror, self realisation, introspect' - edited by BoneRemake

since i can only self-promote.i really love this idea deano.
i thought this nugget was poignant and touching.
deano tried promoting ...i shall assist:
http://www.videosift.com/video/Angel-A-the-mirror-scene#comment-828077

need a tissue?

Quite moving and unusual isn't it? It's called Angel-A.

In reply to this comment by enoch:
In reply to this comment by Deano:
*promote
great promote...what is the name of this movie?
fantastic..../sniff-sniff
got a tissue?

In reply to this comment by Deano:
*promote
great promote...what is the name of this movie?
fantastic..../sniff-sniff
got a tissue?

The mirror scene around 3:17 reminded me of Zerkalo (by Andrei Tarkovsky)..

This is a dupe, I'm afraid:

http://www.videosift.com/video/Mirror-Scene-from-Duck-Soup-Classic