That is so cool!
Would be good to see the 2D too.
That way you can see difference.
I saw those on Tumblr before it was cool ;)
There's some really nice Star Trek Into Darkness ones.... *ahem*
It is slightly more than just "painting two white lines on an image" though isn't it. The lines don't go over the whole image, parts of the image go behind and in front of the lines, so not just a case of get gif, paint lines, profit.
Still cool nonetheless