Dissociation is the subject here, described from the inside. The speaker asks to be "split away from reality," and what follows reads like a record of that wish coming true. The mind "melts," the body feels like a stranger's, and time slips past in a blur. The image of "buzzing gnats" is a sharp one: time doesn't pass calmly but as a swarm of tiny, irritating moments that can't be caught or held.
The feeling is a mix of numbness and quiet panic. The opening line sounds almost like a plea, yet the "flesh rends" suggests the detachment isn't painless. The short, broken lines mimic a mind coming apart, and the dash before the final line creates a drop, as if the speaker slips out of the poem itself. "Out of existence" lands flatly, without drama. The mood is eerie, hollow, and unsettling, because the speaker seems to be disappearing while watching it happen.