"No"

"Corpo-"

"No mean no, brat"

Eren hesitated, he opened his mouth to speak but Corporal Levi shot him a glare that made it snap back shut. He didn't think the idea was as bad as Levi made it seem, but he was already starting to doubt himself under the Corporal's steely gaze. Levi could do that to people, make them feel tiny without even saying anything. He shuffled his feet on the shiny floor of his superior's office.

"But there was this book we had when I was a kid and it said that people used to have these big flying machines for transportation called airplanes and I thought if we could somehow make something like that, maybe we could get outside the walls and back safely."Eren said, his words were spilling out before he could stop them.

Levi pondered on what he said for a moment, his thoughtful silence only making Eren fidget, "Possession of those books are illegal", he finally replied.

"Uh..." Uh-oh Eren thought. He'd slipped. Armin had told him a million times that that book needed to be kept a secret. Dammit.

"Whatever, I don't care about your stupid book," Phew!

"But," he continued,"I've been dealing with you shitbrained trainees for years and that has got to be the stupidest things I've ever heard."

Levi leaned back in his chair and looked at Eren's baffled expression. Eren was clearly hurt, but he figured the little shit would get over it.

"Are you feeling ok, brat?" He continued after a moment, "Because your thinking is funny. Just because we've managed to use 3D maneuver gear to move through air, doesn't mean humans should start flying, we were never meant to actually fly, flying is for the geese," he finished, rolling his eyes.

"But if we could just..." Eren struggled on, obviously not willing to give up so easily. Levi waited patiently for him to stop talking. Poor shitty brat, I'm embarrassed for him, he thought, completely ignoring what Eren was trying to tell him.

"Or maybe we could use the gas to pow-"

"Yaeger," He interrupted,"Go to the medical center, you're delusional". Eren tried to protest but was silenced with another glare.
"Unless of course I could inflict an injury to help... motivate you into going" He said, keeping his gaze steady with Eren's.

"Y-yes Corporal!" Eren said quickly, then spun around and hurried out of the office. Rivaille watched his retreating back before going to his papers and sighing heavily. At this rate, that kid is going to end me before the titans get the chance.