> Huh? Do you have a reference for that? I can't find the "making of" video where they tell how they did this, but here is the cut scene: https://youtu.be/tZNE

> Huh? Do you have a reference for that? I can't find the "making of" video where they tell how they did this, but here is the cut scene: https://youtu.be/tZNE637BeEI https://youtu.be/tZNE637BeEI In scenes where you see Arnie's face in the mirror at the same time as his head being operated on, it's not a mirror, and one of the two Sarah's is not Linda Hamilton (whoever's face is shown less clearly). Edit: lots of hits on Google saying this is how they did it, but I cannot find a single authoritative reference, like a making of video or someone involved in the production saying so.