There Kevin was struggling to maintain dominance over the the body and physique he was almost magically given. Tony was pushing at the other occupants limits as the body was structurally reverting back to Tony's physique, quite heavier and strikingly more powerful in appearance.
"No Tony...you can't reject me...I was about to win!" Kevin can feel the last of his hold over the body becoming undone as he is becoming the one trapped inside. "No more Kevin, your joy ride is over. Now to rid myself of you." Now, the body completely Tony, he sticks his finger down his throat and induces vomitting. Slowing and unceremoniously Kevin's essence is rejected from Tony's body as a fluid metallic mass. As the last of Kevin was expelled he waited there to see him reform into his former self, but as nothing was happening he decided to just take off.
Kevin, left as a miserable mess slinks off from the cabana onto the beach when...