This is always the toughest part. Nearly two decades I've been doing this, and it still jars me to look into the glass and see a total stranger staring back. It's like pulling an image out of the depths of an autostereograrn. For the first couple of moments all you can see is someone else looking at you through a window frame. Then, like a shift in focus, you feel yourself float rapidly up behind the mask and adhere to its inside with a shock that's almost tactile. It's as if someone's cut an umbilical cord, only instead of separating the two of you, it's the otherness that has been severed and now you're just looking at your reflection in a mirror.