I like the idea of the heat blur. I think it can be most effective if it's very subtle. Which is something AdY is good at.

Visually it would remind me of that burst of heat in your face when you open your oven door. Imagine being forced to endure that AND more while strapped down. Jeez.

"I've always thought it's a horribly glaring omission (puppet limitations) that we never got to see Luke learning any saber skills, other than blocking the shots of the remote for all of 60 seconds, which is about all Ben ever showed him. Levitating rocks and running through the woods with Yoda on your back hardly seems like really inclusive training to me. After all, Luke's entire purpose in life was to defeat the Sith, seems like combat training would be a fairly high priority, no?

Obviously Yoda must have taught him something, and just thought it might be neat to see on screen."

^^ I agree. I can't think of a good place to put such a scene but it would have been nice. If EsB were made today no doubt we'd see Luke training with his saber on Dagobah.