Explosion

At 11:20 PM last night, I was standing outside of my house. I saw a flash on the hillside above and heard a loud explosion. I don't know if it was a propane tank explosion, an errant stick of dynamite or Al-Qaida operating in Mexico. It ruined my plans for the evening. I locked myself inside the house. At least one other person heard it, Doña Markokio who lives on the switchback above us.