I have a theory. Watch this scene, and then jump to where Roy is meeting with Tyrel, a few moments through Tyrell's speech, look there. You will see Roy with tyrel's hand on his shoulder. The camera angle is diffrent, and it appears to be a diffrent shot, but the light and scene appears the same. this might have been a cut that was rejected and they decided to use it here.
I don't believe anything in this movie was accidental. Some things couldn't be helped--yes she had no high heels on her boots, yes the glass was already broken...but yes. there were 6 replicants (read the book you guys). Everything in this movie is symbolic, or deliberate. The hand serves a purpose.
The climactic scene is supposed to occur at the Bradbury, an actual hotel in L.A. This building is only a few stories tall. However, when Rutger Hauer chases Harrison Ford out onto the roof, they are suddenly about eighty stories above the street.