I think the weirdest form of fatphobia I keep bumping into is writers suddenly becoming deeply concerned with physical realism when a fat character is involved even in contexts where everybody's physical capabilities are explicitly bullshit. "They're fat, it wouldn't make sense for them to have super speed" and it would make sense for the 98-pound twink to be able to run at Mach Fuck? That's something skinny people can do in real life, is it?