The verge wore off.
When a Craver gives into one's cravings and eats their second cursed ingredient, they enter a limbo state called the verge; where they turn into what is akin to Timbers for a brief moment until they turn into the terrifying gluttonous monsters.
It seemed that Lilo had reached his breaking point. He was lucky enough to let his friends escape though.
The feeling of uneasiness and despair dissipated into something akin to what Lilo had felt upon his first death.
The eerie feeling of your life flashing before your eyes, the reminiscences of regrets, all of the physical pain dissolving into one's trauma…
All of these things returned back to Lilo as he stayed slumped over on the head of the colossal dragon beside Cavity who roared out in mocking laughter.
Lil didn't have to guess what was happening. He already concluded his suspicions on his fate.