I was watching the Empire Strikes Back last night and I think I stumbled on a hidden sub-plot.
When Han turns the Falcon around and goes right at the Star Destroyer after escaping the space worm, we all know that he look like he's going to hit the bridge, then disappears, makes some sort of unreal G-Force braking maneuver, and attaches the Falcon to the back side of the SD. Captain Needa rightfully predicts that the ship doesn't have a cloaking device, and which point he gets the call that Vader wants an update on the situation - 15 minutes later, RIP Captain Needa.
Something never sat right with me about this scene, and I think I've figured it out. The dude who says Vader wants an update is way too tall to be sitting at that station. No way he's sitting there 12 hours a day, or whatever the standard Imperial shift is. He's all legs. No way he'd take that job. He's there because he's up to something, and I think I know what it is. Wookiepedia says his name is M'Kae, which is what Mr. Garrison says on South Park.

You've got Captain Needa, already high up the hierarchy, running the SD
Avenger, still a young man, guy has the world on a string, right? Born on Coruscant, his dad probably bought him an officership so he didn't have to spend 18 months as a stormtrooper on the Outer Rim.
So one day, homeboy is on leave and he bumps into this good looking woman at a bar. A little flirting, he asks if she's ever done it in a TIE Interceptor before, and at that point she has to mention she's actually married to a guy who is also in the fleet - and it's the tall guy in the picture - M'Kae. Now Needa doesn't know this guy from an Ewok, he's just some scrub, and Needa's a damn captain. So he decides to hook it up with Mrs. M'Kae, figuring it's a hit and quit, like bullseying womp rats in a T-16, but she grows on him and eventually one night after she finally lets him hit it Tauntaun style, he says he loves her and she decides to kick M'Kae to the curb.
She dumps M'Kae over the holonet, but she doesn't realize that Needa was checking his email on her computer and the message sends from his account. Now M'Kae is heartbroken and knows that Needa stole his wife. So he starts plotting his revenge. Probably going to off him on the bridge and then kill himself, so there's no trial, no hard time on Belsavis. He pays off some dude to get up on the bridge, but all of a sudden they're attacking Hoth and then they're in an asteroid field, so he can't do it now or he'll endanger too many people.
Then, everyone is talking about Vader force choking Admiral Ozzell for being a moron, and M'Kae gets an idea - I don't have to kill Needa and ruin my career if I get someone else to do it for me.. So he starts hatching a new plan and suddenly the opportunity is in his lap. Needa's lost the Falcon and doesn't know what to do next.
Which leads me to my real point. Vader asked for an update on the pursuit? Can you imagine Vader saying to any person, "Hey, let's get an update on that healthcare policy? I've got the kids this weekend and I want to wrap it up before 5 on Friday?"
Hell, no. Vader probably was looking at the radar on the
Executor, saw what happened, and went back to his hyperbaric chamber to sulk.
But ol M'Kae just lobs the grenade, "Oh, hey, Captain Needa, Lord Vader is demanding an update on the pursuit."
And that makes it even worse for Needa. Because now he flies over to the
Executor, interrupts Vader while he's watching his Boonta Eve win from 32 BBY on the Podracer Classic channel, and tells him something he already knows. Boom, Needa's down and M'Kae, like Darths Maul and Sidious before him, at last has his revenge.