The gemara suggests all sorts of kal vahomer arguments that raise doubts on many of the halachot we have been learning. However they are all rejected based on inferences from the verses in the Torah. Is there a ransom payment only by keren type damages or would one also be responsible if an animal killed by trampling in the property of the one who was killed? The next mishna discusses the responsibility of a person for damages. He is responsible even for unintentional damages. Raba brings a list of cases where an act was done unintentionally and discusses the law for the various unintentional acts in different areas of law – damages, work on Shabbat, killing unintentionally and going to the refuge city, and a slave who goes free if you damage him.