i always saw Sans' 'time manipulation' to be more so him manipulating the game's loading zone entries. So I can imagine a gag with him walking through a door and being able to get into someone's room like it's monster's ink. But in this comic he quite literally theoretically alongside his brother use the comic, literally like Deadpool.
The point is, no matter what medium he’s in, Sans has enough 4th Wall Awareness to be able to manipulate the medium he’s in so that he can be lazy. And honestly, king shit.
-TQ

