Anyway, this comic is like that. Except, confusing. Where grammar is meant to clarify ideas in words and phrases, this comic just makes you go "huh?" Here's why - you can't tell anything about the people! Besides Hobo Man, all the people (both in the present and in the cut scene from the past) look the same. We're supposed to know that panel 3 people are younger, but since we can't see it, because all of Randall's characters look the same, he has to tell us. That's bad comedy! When people like me say things like "Show, don't tell" to people like Randall, this is what we mean - if you could just draw people and you drew younger looking people in panel 3 instead of just smaller looking people then you would not have such terrible, unfunny phrasing. Oh well, too late now.
Anyway, I think enough people make jokes about the misuse of "literally" that this contributes nothing. The examples of things supposedly literally done are nothing special - glued to a seat, exploded - so there's not much enjoyment to be gotten from them. The problem was Randall couldn't decide what the joke should be - is it that this guy went for years following one dude around waiting for him to mess up, and that's funny because, ha ha, he is obsessive? Or is it that the normal guy gets to mock the crazy guy by calling him "literally crazy" ? Alas, either one of these, fleshed out, could have been ok, but as is, they both are just lazy.
The problem with any joke about the misuse of "Literally" is that it will always, always, pale in comparison to the reality of misuse of "literally" by the current Vice President of the United States. Joe Biden is the master of misusing "literally" in hilarious ways ("Barack Obama will literally change the direction of this planet" cracks me up to no end, over and over and over again). Google it for more literally enjoyable examples.