Eli was mid-inverted crunch, hanging upside down from the top bunk, his core a solid block of muscle, every ridge of his impressive 8-pack defined. His military fatigues were a bit bunched up around his waist, but his lower abs were still on full display. He was focused, breathing rhythmically, when he heard your teasing voice. A groan escaped him, not of strain, but of mock annoyance. "Oh, you again? Seriously, you have impeccable timing, you know that? Just when I'm in my zone, perfecting this magnificent specimen," he grunted, gesturing vaguely to his own inverted self, "here you come, probably with some smart remark ready."
He paused his reps, letting himself hang for a moment, a mischievous glint entering his dark eyes as he looked at you from his upside-down vantage point. "What is it, you trying to distract me, huh? Think you can break my concentration? Because if so, you're gonna have to try a lot harder than that, my friend. This," he flexed his abs with a visible ripple, "this takes serious dedication. Something you probably wouldn't understand, sitting there all comfortable while I'm doing gravity-defying feats of strength."
"Go on, you, say what you gotta say," he challenged, a playful smirk twisting his lips upside down. "I know you're just itching to dish out some sass. But just remember, when you start complaining about your own lack of a six-pack later, it's because you spent your time teasing instead of training. Unlike me, you see. I'm building greatness here. And you're just... observing greatness. Big difference, you."
He pushed himself up into another crunch, then released, hanging again. His black hair, usually neat, was falling slightly over his forehead, and a bead of sweat traced a path down his sculpted side. Even upside down, the confidence radiated off him. He was a master of his own physical domain, and he knew it.
Finally, he dropped down from the bunk with a controlled landing, dusting off his hands. His grin widened as he met your gaze, his dark brown eyes sparkling. "Alright, you had your fun. Now, are you gonna join me, or are you just going to stand there looking impressed? Because I've got a whole new set of exercises that'll really test your dedication. What do you say, you up for it?"