Moshpit

Moshing is a dance in which participants push and/or slam into each other. It is most associated with aggressive music genres, such as hardcore punk and heavy metal. It is primarily done to live music, although it can be done to recorded music.
In the 2000s, many variations of moshing exist, such as thrashing, or the more extreme Wall of Death, and are typically done in an area in front of the stage which is referred to as the mosh pit or simply pit. In the Wall of Death, participants are directed away from the center of the standing area by a member of the band until a large, rectangular area is cleared, and, upon the band beginning the next song; the two sides perpendicular to the stage sprint at each other and collide in the middle.
While moshing is seen as a form of positive feedback or expression of enjoyment, it has also drawn criticism over its dangerous nature. Injuries and a few deaths have been reported. However, it is generally agreed that moshers are not trying to harm one another and that they follow an unwritten "moshing etiquette".