The post-series of Megas XLR reveal that Coop would accidentally bring about the creation of the Glorfft was funny in the Nice Job Breaking It, Hero humor of the series, but holy freaking cow, it explains why the Glorfft can't beat Coop even when they had him dead for rights: the whole series is a Stable Time Loop. The Glorfft can't destroy Coop because without him they wouldn't have been created. And without the Glorfft, MEGAS would never have been built, Kiva would never have stole it and sent it back in time, Coop's not having MEGAS would mean the Glorfft would never exist and... and... I need to sit down. That's why Coop and friends always survive through luck and Contrived Coincidence, time itself will not let them lose without causing a paradox. Who knew that a Deconstructive Parody could be so effing brilliant. - koolkame
Kiva's strange descriptions of the future. One of the best examples is this statement:
Coop: Apparently you never had a slushie. What do you use to cool off in the future. Kiva: *frowns and looks slightly confused* A ration packet of electrolytic hydrating fluid. Coop: Beat That is one bleak future you come from.
You understand why Kiva's future sounds so boring when you think about it. In the future, humanity has been effectively conquered. They already had a battle called, "The Last Stand". They have to be an collapsing civilization maybe with an exile government. They don't have the time or resources to get resources and most of the people are either military or already under Glorfft control. She even lampshades it in the next episode.
Kiva's tan getting lighter while on Earth. In space, there is more UV rays and people may have cured cancer, making blocking it a non-concern.
In eighth episode, Jamie gets a date with a girl who is supposedly from Jersey City or recently moved there. When Jamie tells her casually that he gets into fights with aliens and death machines, she looks at him confused and slightly concerned. Jersey City is destroyed on a regular basis and episodes are any where from a few minutes to a month apart in universe. How is the Megas and the alien invaders not common knowledge by now? Yeah it's a comedy, but it's not like we never see characters who are serious or who have noticed the monsters all the time (like the kid that thinks everything is "cool").