Usually sudden<unk>  that catch the human by surprise.
Can produce large crush injuries, punctures, and lacerations.
Delayed presentations can have polymicrobial infections, which can cause serious deformity, sepsis, and even death.
Alligator and crocodile attacks
Toxins
Deterioration after intubation
Ciguatera
Heat syncope
Scombroid
Heat tetany
Tetrodotoxin 