The Laws of Nezikin: The Pit (Mitzvah 53)
The pit (בור) is one of the four avot nezikin (paradigmatic types of damage) and isn't limited to a pit but to any obstacle in the public domain.
When is the owner responsible vs. when does is the onus on the victim for not being more careful?
In many areas chazal "mix" domains (e.g. throwing straw into reshut harabim, the concept of eruvin).
What is the halachic status of damage caused on a sidewalk?
Delivered at the OU Israel Center, Wednesday, November 14th, 2018/6 Kislev 5779