Bingowings said:

Practically all of Yoda's last minutes.

Obviously I paraphrase here to illustrate the problem.

YODA : So you came back, oh yes I look a bit different *cough*, I guess I won't be around much longer, needn't have bothered as you learned everything you need the last time I saw you. Yep Vader's your dad, I would have told you but you hadn't finished your training but as I just said you sort of had. Luke, remember that first lesson I taught you about the dark side? Well I'm dying now, there... is... another... hold that thought, it's my last breath... Bye!

I disagree. I always have figured that Yoda is dying precisely as he means to. He waited for Luke, tells him what he wants, then joins the Force. I think he said exactly what he wanted to say, and for a little drama queen like Yoda, he probably liked the rapt attention when your audience thinks you'll die any second.