Boy group HISTORY's dance practice was revealed.

On Tuesday, agency Loen Tree released the dance practice video of HISTORY and their comeback title song "Might Just Die."

In order to master the 'bunjee jump dance' that is the key point of the choreography- the members were injured in many different places. The 'bunjee jump dance' is a move where all members fly into the air and connect in a wave formation as they come down.

But in order to master the dance, despite hurting their waist and wrists- the members practiced the move over and over until they perfected it. In the video, the members fall hard onto the floor while practicing it.