Darkness. Thick, black as pitch. Like he threw himself headfirst into a tar pit.
It made no difference whether he closed his eyes or kept them open. Either way, there was nothing. Just him, floating inside a dead void.
Until suddenly, the darkness shifted, like some great thing had awoken from its sleep and was beginning to stir. The black void pitched and folded in on itself, forming barely visible lines of something unfathomably large. Twisting and turning.
Teeth. Then a tongue. Then lips. A maw, vast enough to devour the void.
A maw fit to swallow him whole.