Darth Venal said:

brash_stryker:

You keep saying that he's falling down the lift shaft not the reactor core shaft. Please explain how you know it to be a "lift shaft".

It might be because he's right next to the lift!

And if you look at the scene it's crystal clear that the Emperor is electrifying Luke next to the railings on the lift shaft, and Vader throws him down it.

Watch the scene, it's indisputable.

Let's say that the lift is directly by the shaft. We see Luke and Darth exit said lift, and it's just big enough for 2 people to stand in side by side, so it can be assumed that the shaft of the lift intself wouldn't be much bigger. I don't understand you referring to the shaft the emperor gets thrown down and the shaft of the lift as the same thing. Does one lift need that whole entire shaft to accomodate it? No. So we can safely assume that this shaft is not primarily used for just one lift.

You'll notice there are also walkways going across said shaft near the top. This doesn't call the main purpose of the shaft into question either.