26. Suffering From a Headache
An acquaintance of mine sent his son to a triathlon camp in Texas.
A week later, his son came back from camp. The next day, the son was complaining of a headache. Four days later, he was dead. Healthy, happy, fit 12-year-old one week, dead the next.
Turns out the lake had Naegleria fowleri, the brain-eating amoeba. Nothing scares me as irrationally as already being dead and waiting for your body to catch on.
Link for those interested.