What is the reason of R. Meir? Abaye said: Lest it die. R. Zera said: Lest it escape. Concerning an elephant securely bound, all agree [that the Sukkah is valid], since even if it dies, there is still ten [handbreadths height] in its carcass. Regarding what then do they dispute? Regarding an elephant which is not tied up. According to the one who says: Lest it die, we are not concerned; According to him who says, We fear lest it escape, we are concerned.