He wouldn't, okay maybe in the right circumstances that might happen. But those circumstances don't seem to be happening now so it should be okay. Right?

Yamamoto can not see the grin, only because his eyes are sleepy and he is having to focus on where he is walking. He stifles a yawn even as he is still recovering from trying not to laugh.

He rubs at one eye as if it's itchy, never one to take a break or stop till he has to, Yamaoto is in fact considering that the tree over there looks comfy.

"Hey Gokudera, mind if we take a break, I'm feeling kind of sleepy and it'd give you a chance to warm up better." Really he just wants to sit down and is in fact heading for that comfy-looking spot he sees.