The Vortex does, of course, put him back together and reverse the damage. It's essentially the same process as with any other Jack, and the Vortex knows exactly what it's doing, and what has to be and what Jack is, even if this Jack doesn't.

Coming around though? Is violent as hell. His hand clamps down on Jack's hand, reflexively. He tries to exhale before he inhales, half-gagging on air and the taste of blood in his throat. His eyes are open before he's really seeing -or at least before his brain is translating what he's seeing into useful information.

Disoriented and fucked up doesn't begin to cover it. He'll go back to smarting off soon enough but in that moment? He's terrified, confused, physically and emotionally out of control, and mentally just Not All There.