Lesson #1 in dealing with large, carnivorous wild animals: they are not pets, and are not trustworthy!
It seems that some airboat 'captains' in Florida have been ignoring that lesson. One of them's just re-learned it the hard way, as this TV news report shows.
There's another (written) news report here with a few more details.
Repeat after me: "Thou shalt not place thy bare hands, bearing food, in the immediate vicinity of an apex carnivore's mouth!"