A mongoose deals with a snake by feinting, dodging and moving faster and with more agility than the snake, abilities given by natural selection to the mongoose but which must be learned by the wrestler by training and practice.
An elephant just walks up to the snake and stomps on it. The wrestler still has to develope the power by training, of course, and skills are also important, but power goes a long way. If one of these big fellows gets ahold of you, or even worse, on top of you, well, that can really spoil your whole day!