A toro de fuego ("fire bull" or "bull of fire") (Basque: zezensuzko)[1] is a festive activity in Spain wherein a metal frame resembling a bull, with fireworks attached to it, is set alight, and then carried around town at night as though chasing people in the streets.[2] Participants dodge the bull 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 towns during their local festivals. This custom may have originated to replace the Toro embolado, in which a real bull is involved.
A similar custom in Ecuador and other Latin American countries is known as "crazy cow" (Spanish: vaca loca').[3]