Long time no post, but I did a topic search and found nothing on this idea posted previously, so I'm going to ask about it.

In this scene, when Vader swings his saber down to hit Luke and misses, you can hear his saber hit the floor. However, nothing visual happens during the strike to the floor. No sparks, no light from sparks, nothing.

In later scenes when Luke and Vader's sabers strike walls and handrails, there are either sparks or cuts. The same for Return of the Jedi when Luke hits the handrails before defeating Vader, there were sparks flying each time his saber hit the handrails.

I provided screencaps to show this.

Saber just before striking floor:

Saber hitting floor:

Cut to next shot, same moment of saber striking floor:

Vader's saber lifting off the floor after strike, as Luke begins to roll down stairs:

I would have done a mockup, but I wouldn't know how to create sparks, if they would be visible. But if no sparks would be visible, at least the flash of light from the sparks should be, right?

Thanks for reading.