Bomb culture is a term used to describe behaviour related to using and making explosives. People who participate in bomb culture might make homemade explosives and use them for fun and recreation, either in a controlled way (set off at a specific time and place) or in an uncontrolled way (leave out boxes of explosives in public places). They might also use explosives as weapons, either against people or property. In some cases, people in bomb culture take videos and photos of their activities with explosives and post them online.