My question has to do with Puerto Rican culture. – Glass elephant faces the wall or corner of room. Why?

People often place little glass, decrative figures in the homes, such as little glass angles or animals… often on top of shevles or on coffee tables. You can notice that many Puerto Rican people will put the glass decrative elephants facing the wall. I dont’ really know why this is done, but the elephant has to face the wall or the corner of the room. It is supposted to be for good luck I think. Does anyone know why this is done or the tradition behind it. My mother, grandmother, and aunts all do this. I’m pretty sure that it is only a traditon amongst Puerto Ricans, but I could be wrong. Anyone know?