On September 28, 1810, the insurgents attacked the Alhóndiga de Granaditas in Guanajuato, where royalist troops had taken shelter. According to the traditional account, a former miner known as El Pípila “cargó encima de su espalda una gran roca como escudo” (carried a large stone on his back as a shield) against the bullets. He set fire to the door and waited until it gave way. (Video in Spanish.)
The story is recorded in Carlos María de Bustamante’s Cuadro Histórico, published in 1843. The historian Lucas Alamán disputed that such a man existed. Historians still disagree about whether he lived and whether the story is true.