My former upstairs neighbors always sounded like they were leaping from their furniture onto the floor. We would bang on the ceiling with a broom and they would stomp right back. My roommate once called the cops on them for being super loud at 2 AM on a weeknight. They were having some sort of sorority party. When the cop knocked on their door we heard them all run and scatter. One of my friends lived in the apartment above the loud people and she could even hear them stomping.