This night at Clemson University in South Carolina ended with a huge shock and bone fractures: when young people happily danced and jumped at a party, the floor under their feet broke away. The reported CBS and CNN, among others.

The party heard how the floor cracked, a party guest told CNN. But no one knew that he would really break through.

Wow #Clemson pic.twitter.com/gTez1mkR7B

- TrueJerzy (@JERzY_T) October 22, 2018

Another victim reported that the ground had moved like a trampoline before the accident. A few minutes later, dozens fell into the basement with the floor.

Photos and videos of the evening show the huge hole in the middle of the dance floor. More than 30 guests were injured. Most of the victims suffered broken bones. The clubhouse was closed after the incident, police investigations are underway.