In Hobgoblins there are a lot of riffs that the hero's name is Kevin. Then you realize writer and Tom Servo's actor is Kevin Murphy and that he's probably heard all of these jokes at some point.
Also applicable to early portions of Outlaw when the protagonist's name (Cabot) is initially misheard as Kevin.
In the Joel-era theme song, it says that Joel made the 'bots using the parts of the ship that controlled when the movies begin or end. If you interpret that as being some sort of timer, it would explain where Crow and Servo got their comedic timing.
Why Servo sees everything as red- it's not a red-green deficiency, he's got infrared vision! That's how he sees without any apparent eyes. He has an infrared sensor somewhere on his body.
The last days of the Invention Exchange. When Mike is first stranded, he has one good idea of his own for an invention (the Gutter-Bumbershoot), but, not being an inventor by nature (and having no stake in the dispute that was the premise behind the Exchange to begin with), he starts faking it by presenting Joel's leftover and often half-finished ideas as his own. Eventually running out of those, Mike blatantly uses the Exchange as cover for an escape attempt, after which the Mads clue in and discontinue the ritual.
In the final moments of the last episode (Danger: Diabolik) it's mentioned briefly that Gypsy has become a wealthy business tycoon, running a corporation called ConGypsCo, which has managed to become a huge success in the short amount of time that Mike and the bots have been on Earth. Newer fans might see it as a silly joke that The Ditz has become so successful, but astute viewers will remember how it was established way back in the Joel era that the reason Gypsy acts so ditzy is that the majority of her processing power is spent keeping the Satellite of Love running. With the SOL crashed and no longer tying up her resources, Gypsy is likely the most intelligent being on planet Earth.
If we follow the movie's (Soultaker) rules, then the fact that Frank is now a soultaker means he killed someone at some point during his life...
According to him, he just annoyed everyone until they put him into a job where he worked alone a lot. That said, he did describe himself as evil on several occasions.
Frank has accidentally killed himself many times over. That fits the bare minimum of the logic required for this movie.
There's also the debate on YouTube about Frank saying he needs Joel's soul. Did Joel die during re-entry?
Joel will probably be fine, though, given Frank's general level of competence.
Sure, he did get bored at the edge of the Universe, but when you think of the fact that Crow has been on the SOL for 500 years by himself, and doesn't remember Mike when he comes back, you feel really bad for him, because the isolation really did drive him to madness.
What about the position Joel and Mike were put in, where they're kidnapped from their everyday life and put into Space where people try to drive them insane? Don't they ever get home sick and wonder wheen they would see their loved ones and how much time had passed? And Joel/Mike's loved ones must be worried sick when they just suddenly vanish.
In an episode involving time travel, Mike sends Crow back in time to just after he got sent into space, to tell his family that he's alright and that he'll be home as soon as he can. Crow forgets to tell them, and the family never really asks. That's right, Mike's family doesn't care if he's alive or dead.
It's actually somewhat disturbing, when you think about it, how rarely Joel & Mike-especially Joel-show signs of discomfort with their situation.
Mike expresses a little bit of this kind of depression in the Season 5 "Santa Claus" episode.