"Momotxorro" is a character from the Basque carnivals.

Covered in blood and equipped with pitchforks, they stampede down the streets intimidating whoever is in their way;they later calm down during a dance and gather around a bonfire.

This tradition, like many other elements of Basque and other iberian cultures, was banned for 40 years during the Francoist dictatorship of Spain. The carnivals of Altsasu were recovered in the 1980s.