Is it the airpspace of the pit that kills or the impact? Does an impact of less than ten handbreadths kill? If not, why did Rav Nachman claim determine that an animal that has fallen into a pit less than 10 and was then slaughtered, was not kosher for eating as he must have been a treifa (going to die anyway)? Comparisons are made between other areas of halacha where 10 handbreadths are relevant. In cases where two people own the pit or a responsible for it, who assumes responsibility? Does it depend on who dug what? And whether it was for damages or for death?