Hehe! That's funny.
Being carnivorous predators, cats are pretty intelligent, confident and highly aware animals who are capable of inflicting some real damage when they can/need to. They definitely know when to hold 'em, and when to fold 'em. I wouldn't worry too much about one getting eaten by an alligator, although I'm sure stranger things have happened.
It's part of what makes them fun to have around. Trying to outwit them is a constant source of entertainment if you want it. Of course, many (if not most) domestic cats are so spoiled that they lose all their edge, but still. There's a certain amount of instinct they never lose and it can be fairly easily exploited for fun.