Sukkah 23: Would You Really Use an Elephant as a Sukkah Wall?

A general principle on when one can enter a sukkah (with an unusual base) on yom tov - it needs to be able to stand on its own, regardless of the tree that it is in, etc. Plus, this mishnah is attributed to R. Akiva, in contrast to the opinion of Rabban Gamliel. Both of which depend on how much wind a sukkah is expected to withstand. Also, building a sukkah with an animal, both on an animal and using an animal as part of the walls of the sukkah (a contrast between the Torah requirements for a sukkah, and the rabbinic ones).