I was at my brothers house in Acapulco with a cousine,we had come from Chile were we live.We were talking besides the pool on Jan 16 2012,many stars and the sky was lit only by the moon. when I was watching towards Venus when suddendly we saw(my couisin and I)a cloud form come tumbling down from the sky. It was only seconds when we saw it being or becoming a huge triangler shape ufo.It passed over our heads very very low,so low that we could see the bottom of the ufos cell like forms on the surface of the object.It passed about 20K.M and went over the house were we lost sight of it. After about 3 minutes it came from the other direction and passed a little more faster from east to west,durning southwest.It was utter amezment and a sence of joy.So mucho so that we laught and called it back because we wanted to see more of it.