Don't know if these have been discussed before but they always bothered me.

As Luke watches the Falcon blast out of the rebel base his head turns but doesn't seem to be synced with the falcon, like he's looking in the wrong direction.

And (and this thing kind of thing bugs me in lots of movies!) when the swamp creature spits R2 out on Dagobah we see Luke watching his flight but his eyes don't roll smoothly because he had nothing to look at for reference. Instead his eyes fix on several places.

What they should've done is have someone off camera even just wave a stick or something to show the path of R2 so that Mark could follow it with his eyes.

Hope I explained that well enough :-\