Rosecrans Baldwin — 15 pouches a day to zero, overnight
Baldwin was going through a can a day when he quit cold turkey. Roughly four hours in: dizziness, sweating, racing heart, and hallucinations — which he later realized was a panic attack triggered by acute withdrawal. He described being afraid he'd lost his mind. That first attempt failed and he relapsed onto cigarettes; a months-long taper is what eventually worked.