http://media.tumblr.com/tumblr_lq1zim0uBa1qc6nfn.jpg
I think there was a theory that, during the original shooting, Vader was supposed to make contact with Luke right there in the hangar, briefly and wordlessly and that maybe it was changed in post in 83 from the original concept, and cobbled together from a lot of other bits. (Vader in the chamber is from EMPIRE, Vader walking down the corridor may actually be from the Jerjerrod scene, some of the dialogue). Not sure.