I like the growing consensus that Vader let him get away he was disgusted by the broken pathetic Jedi![]()
That happened to Captain America once in the comics, IIRC. Cap was distracted and upset about something, a villain appears - I forget exactly who- and says [along the lines of] "Yeah old man, I could take you now but Im not doing that, because I want you at the top of your game, I want to prove to everyone you ain't really all that, and killing you now would be a cheat. Right now anyone could kick your @ss. I'll be back later when you're over all this and I'll be bringing an @ss-beating with me when I do" and Cap was thinking to himself, "Great!...!"
I could see Vader doing this.