A short list of some of the unique food poisonings and the toxicologic effects:

• Ciguatera toxin (fish): hot-cold sensation reversal
• Tetrodotoxin (fugu, puffer fish): paresthesias progressing to paralysis and dysrythmias
• Scrombroid (spoiled fish): flushed face due to histamine ingestion
• Paralytic Shellfish Poisoning (mussels, clams, etc): acts like curare, toxin is saxitoxin
• Amnestic shellfish poisoning (mussels): exactly what it says, loss of memory - very cool