He nods, roughly, gulping a little air and trying to make his heart slow down.

"Probably was - probably hallucinatin', right? Losin'... losin' so much water that I was just hearin' things..." He doesn't sound so much like he believes it rather than that he's trying to believe it.

When he speaks again, his voice it quiet.

"I shouldn't be alive, Gunny. I shouldn't -- ain't no one that can live through that, my skin was comin' right off my bones--"