A toro de fuego is a festive activity in which a bull-resembling metal frame, with fireworks

Fireworks

Fireworks are a class of explosive pyrotechnic devices used for aesthetic and entertainment purposes. The most common use of a firework is as part of a fireworks display. A fireworks event is a display of the effects produced by firework devices...

 attached to it, is set alight, and then a person carrying the frame runs around town at night as if chasing people in the streets. Participants dodge the bull-frame when it comes close, especially because the burning fireworks set off sparks that can cause small burns in people's skin or clothes. This activity is held in a number of Spanish

Spain

Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...

 towns during their local festivals

Fiesta patronal

The Fiestas patronales are yearly celebrations held in countries influenced by Spanish culture.A fiesta patronal is usually dedicated to a saint or virgin, who is the patron of whichever city holds the fiesta. Usually, town members adorn the town streets with colorful decorations and other things...

. It's possible that this custom originated in the toro embolado

Toro embolado

A toro embolado is a festive activity, typical of many towns in Spain, in which a bull that has balls of flammable material attached to its horns, which are set on fire, is set free in the streets at night, and participants dodge the bull when it comes close. It can be considered a variant of an...

, in which a real bull is involved.