He's breathing very shallowly, lips blue. He honestly looks like he gon die.
(Heh my actually cpr certified ass go brrrrrrrr-)
Kaz bolts upright, spitting out water
Kaz: AHH!
Kaz looks at Baku
Kaz: ...
Kaz: ....Y'know, I really wanted to tell you something but you probably don't care anyway...
He struggles to get up but eventually does, starting to walk away
Kaz: Forget it. Just-just fuck off...