While not tech related, imagine being poisoned in a way that you could no longer differentiate hot and cold. When you touch something cold, it feels burning hot and vice versa.

Eating some bad fish might not seem like the most spectacular way to ruin a tropical vacation, but for a 45-year-old man from England, a bit of tainted seafood was the beginning of a wild ride. Cold water felt burning hot. Hot things felt icy cold. His tongue felt strange. Drinking alcohol or coffee only increased his suffering.The patient had ciguatera poisoning -- an ailment caused by ciguatoxin, a neurotoxin that is produced by microorganisms and found in a wide variety of tropical fish.