It takes place annually to celebrate the Catholic feast of Corpus Christi in Castrillo de Murcia, a village in the municipality of Sasamón in the province of Burgos.
The "devils" hold whips and oversized castanets as they jump over the infant children.
[3] The Brotherhood of the Blessed Sacrament of Minerva [es] organizes the week-long festivities, which culminate on Sunday when the Colacho jumps over the babies on the mattresses placed on the procession route traversing the town.
[5] Pope Benedict XVI asked Spanish priests to distance themselves from El Colacho, as the Church teaches that the original sin is cleansed by baptism.
[6][7] As an unrelated Christmas tradition, El Colacho (short for Nicolacho or Saint Nicholas) is Costa Rica's version of Santa Claus.