[ Bak's hunched over, towel wrapped around his weight and hair spiked from the unprecedented amount of hard work he just put in after the two hours of hard exercise. He's by no means out of shape, but he's not exactly... free of pudge either, not after the last few months of energy drinks and being force fed by Komui (not that it is any different from Fou).
Therefore, as he stares down at his stomach and pokes at his flesh, he might (just might) be heard saying... ] I thought you were made of sterner stuff then this. Shape up, or else!
[ and yes, he is talking to his fat. Some men actually need that tiniest bit of a pep talk... ]
[ option 2:meditation ]
[ Finally! A task that Bak excels at. He'll be sitting on the wayside, cross legged and sounding out his ohms. Poke him, nudge him, make a noise and he will give you the stinkiest stink eye that ever was.