University of Nort Texas junior Abiola Busari hosted a homecoming party in this multi-story student apartment building.
Dozens of people are seen crawling on the floor below, while others try to maintain their balance as the third floor crumbles away.
Most of the residents at the Ridge Apartments are OK.
Denton Fire Captain Brian Glenn says the collapse likely broke pipes and plumbing and investigators were out Sunday afternoon analyzing the damage.
The floor collapsed under University of North Texas students partying during homecoming..
Six people were treated at the scene, but no one was taken to the hospital, according to Denton police.
Carley Carroll is a UNT sophomore who lives on the second floor directly below the unit that collapsed.
Local firefighters believe the floor collapsed because of too much jumping. Moments before the collapse, two of the tenants drove to the police department to report the loud party that shook their home.
She said: "It's just one of those, it's like it happened".
Carroll told the station she's called the cops on her upstairs neighbors' parties before. "Everything you need for college is gone", said Carroll.
Denton police tell NBC 5 that they never received any 911 calls to complain about the noise before the collapse.
Students affected by this say both the apartment management and the university have helped secure places for them to stay, mostly in hotels or dorms and food.
"Currently the building is completely shut down. until the apartment complex can get a structural engineer, and a construction crew out here to check the building out and certify that the entire building is safe", said Denton Fire Marshal Brad Lahart.