Correfocs (Catalan pronunciation: [ˌkorəˈfɔks], Western Catalan: [ˌkoreˈfɔks]); literally in English "fire-runs") are among the most striking features present in Catalan festivals. In the correfoc, a group of individuals will dress as devils and light fireworks. While dancing to the drums of a traditional gralla, they will set off their fireworks among crowds of spectators.
In this image, a devil is lighting a firecracker behind the people who is watching the sound and light show and the people dancing below the sparks of the firecrackers.
A devil behave as a devil.