That pose Max is in can only mean one thing...
Max's body is possessed by one of the Soda Poppers!
"Always expect the best of others... And watch as your hope is crushed like crackers in a fat man's bed. And the fat man is angry. And the fat man has a sledgehammer. And the fat man is yelling 'DIE, CRACKERS, DIE!!'"
- Rat, Pearls Before Swine