I heard a loud thump on my porch, then i saw my cat chasing away some sort of pitt dog: the dog then hopped my neighbor's fence and started running all around the place. Then after a bit i heard yelling, then my neighbor shouted "that dog scared the shit out of me!", I went over and asked if they saw a big grey cat but they didn't and asked if the dog chased my cat away, but i told them "No, my cat chased the dog away", then they were all laughing and thought that was the funniest thing; The owners of the dog are looking for it though but all of this shit had to happen right after i woke up