Possibly related tidbit - I used to roll my own cigarettes when working in the field as a geologist, left a pack of papers under the seat of my truck which had no carpeting, spilled 100% DEET on the floor, DEET absorbed into pack of papers. Months later found those same papers (what luck!) and rolled a cigarette without thinking about it, minutes later I was asking my now wife if she "could hear the helicopter sounds…
DEET is a good acetylcholinesterase inhibitor - certainly possible it has mild hallucinogenic effects.
DEET isn’t a cholinesterase inhibitor.